Add drag-to-snap areas for eighths (rxhanson#1708)

* Add drag-to-snap areas for eighths

Adds compound snap area support for eighths (4x2 grid), following the
same pattern as sixths. Can be enabled via terminal command or selected
in the Snap Areas preferences tab.

Terminal command: defaults write com.knollsoft.Rectangle eighthsSnapArea -bool true

Particularly useful for ultra-wide monitors.

* Remove unused terminal command and migration for eighths

The snap area migration only runs for versions < 64, so the terminal
command would not take effect on modern installs. Eighths snap areas
are configurable directly in the Snap Areas preferences tab.

* Add eighths image assets and shortcut recorders

Add icon assets for all 8 eighth window positions and wire them up in
WindowAction.image. Add shortcut recorders for eighths to the Extra
Shortcuts popover in the General tab.

Author: liangyuetian

Rectangle.xcodeproj/project.pbxproj

@@ -31,6 +31,7 @@
 		9818E01228B59B64004AA524 /* ThirdsCompoundCalculation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9818E01128B59B64004AA524 /* ThirdsCompoundCalculation.swift */; };
 		9818E01428B5A4FD004AA524 /* SixthsCompoundCalculation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9818E01328B5A4FD004AA524 /* SixthsCompoundCalculation.swift */; };
 		9818E01828B63C48004AA524 /* FourthsCompoundCalculation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9818E01728B63C48004AA524 /* FourthsCompoundCalculation.swift */; };
+		9818E01A28B63C49004AA524 /* EighthsCompoundCalculation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9818E01928B63C49004AA524 /* EighthsCompoundCalculation.swift */; };
 		98192DDA270F606C00015E66 /* Debounce.swift in Sources */ = {isa = PBXBuildFile; fileRef = 98192DD9270F606C00015E66 /* Debounce.swift */; };
 		98192DDE2717201100015E66 /* ReverseAllManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 98192DDD2717201000015E66 /* ReverseAllManager.swift */; };
 		981F27D12340E3E1006CD263 /* InternetAccessPolicy.plist in Resources */ = {isa = PBXBuildFile; fileRef = 981F27D02340E3E1006CD263 /* InternetAccessPolicy.plist */; };
@@ -209,6 +210,7 @@
 		9818E01128B59B64004AA524 /* ThirdsCompoundCalculation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThirdsCompoundCalculation.swift; sourceTree = "<group>"; };
 		9818E01328B5A4FD004AA524 /* SixthsCompoundCalculation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SixthsCompoundCalculation.swift; sourceTree = "<group>"; };
 		9818E01728B63C48004AA524 /* FourthsCompoundCalculation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FourthsCompoundCalculation.swift; sourceTree = "<group>"; };
+		9818E01928B63C49004AA524 /* EighthsCompoundCalculation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EighthsCompoundCalculation.swift; sourceTree = "<group>"; };
 		98192DD9270F606C00015E66 /* Debounce.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Debounce.swift; sourceTree = "<group>"; };
 		98192DDD2717201000015E66 /* ReverseAllManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReverseAllManager.swift; sourceTree = "<group>"; };
 		981F27D02340E3E1006CD263 /* InternetAccessPolicy.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = InternetAccessPolicy.plist; sourceTree = "<group>"; };
@@ -378,6 +380,7 @@
 				9818E00F28B59396004AA524 /* HalvesCompoundCalculation.swift */,
 				9818E01128B59B64004AA524 /* ThirdsCompoundCalculation.swift */,
 				9818E01728B63C48004AA524 /* FourthsCompoundCalculation.swift */,
+				9818E01928B63C49004AA524 /* EighthsCompoundCalculation.swift */,
 				9818E01328B5A4FD004AA524 /* SixthsCompoundCalculation.swift */,
 			);
 			path = CompoundSnapArea;
@@ -873,6 +876,7 @@
 				9821402322B3886100ABFB3F /* CenterCalculation.swift in Sources */,
 				98A009AB2512491300CFBF0C /* CenterHalfCalculation.swift in Sources */,
 				9818E01828B63C48004AA524 /* FourthsCompoundCalculation.swift in Sources */,
+				9818E01A28B63C49004AA524 /* EighthsCompoundCalculation.swift in Sources */,
 				D0CFE33327A8CCB1004DA47B /* TopRightThirdCalculation.swift in Sources */,
 				94E9B08E2C3B8D97004C7F41 /* MacTilingDefaults.swift in Sources */,
 				9821403522B38A2B00ABFB3F /* UpperRightCalculation.swift in Sources */,

Rectangle/Assets.xcassets/WindowPositions/blEighthTemplate.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "blEighthTemplate.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Rectangle/Assets.xcassets/WindowPositions/blEighthTemplate.imageset/blEighthTemplate.png

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "brEighthTemplate.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Rectangle/Assets.xcassets/WindowPositions/brEighthTemplate.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "cblEighthTemplate.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Rectangle/Assets.xcassets/WindowPositions/brEighthTemplate.imageset/brEighthTemplate.png

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "cbrEighthTemplate.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Rectangle/Assets.xcassets/WindowPositions/cblEighthTemplate.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "ctlEighthTemplate.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}