add the show-viewsetup overlay

Author: StephanPreibisch

src/main/java/net/preibisch/stitcher/gui/StitchingExplorerPanel.java

@@ -523,6 +523,7 @@ public void mouseClicked(MouseEvent mouseEvent)
 		addColorMode(); // 'c' or 'C'
 		addDemoLink(); // 'l' or 'L'
 		addHelp(); // F1
+		addViewSetupIdShortcut(); // 'v' or 'V'
 
 		addScreenshot(); // 's' or 'S'