Add 'Reset to Defaults' button for mod configs (#364)

* Add 'Reset to Defaults' button for mod configs

- Added a 'Reset to Defaults' button to each mod's config page
- Added a reset to default function to each ConfigProperty (C++)
- Properties requiring a world reload when in-game do not reset
- Fixed text flicker issue in textbox widgets during construction (notably when resetting, values appeared left-aligned briefly before centering).
- Adjusted section widget spacing slightly for more consistent layout

* Improved Reset to Default Functionality

- Returns a bool from every ResetToDefault() to signal success or failure
- Simplified ResetToDefault() so it no longer requires a default property argument
- Added an Allow User Reset toggle on each config property
- Added IsSetToDefaultValue() and GetDefaultValueAsString() in UConfigProperty
- Added per-option reset buttons with tooltips showing default values and why reset is disabled if it is
- Moved the Reset to Defaults button to the bottom right corner to match the game options button
- Added confirmation popups. Shift+click skips confirmation

* Fix UConfigPropertyClass Reset to Default Crash

* Disable reset button with tooltip when settings are default

- Mod reset button now disables and shows a tooltip if all settings are set to their defaults.
- Updated to latest dev commit

* Update config property editor tooltips. Mark bParentSectionAllowsUserReset as Transient

* Prevent DefaultValue from appearing in the editor. Update editor tooltips. Change display name of ArrayProperty `DefaultValue` to `New Value Template`

* Unset 'Hidden' on ExampleMod root config property (how in the world has it been showing all this time?!)

* Fix enum default value display to use name instead of integer

* Add section reset and collapse buttons

* Tooltip for expand/collapse section button

* Fix example array elements requiring world reload, add name to first element as a demo of the tooltip showing it

* Change array element tooltip to display position#, not index

* Switch confirm messages to format text instead of string append for i18n

* Fix extra space at the end of "Nested Horizontal" section name

* Fix array tooltip, improve array default value validator

* Improve detection for resettable child properties in sections

* Add collapse/expand button to array widgets

* Improve array reset button

* Config reset button to use `Update Values` instead of `Custom Construct`

This fixes integer enums not resetting properly and also aligns better with the overall design flow

* Consistent phrasing: "options". Add a tooltip for when the button is enabled. Hide default value when option is set to the default value. Expand array widget if collapsed on add/remove element.

* Add comments for redundant tooltip cases

* Add tooltip for when only hidden config options remain resettable

* Add tooltip for config section with some non-default options that can't be reset

* Improve mod/section reset behavior and clarify related tooltips

- Clarified disabled mod/section tooltip when options require a world reload while in-game
- Added array expansion on mod/section reset
- Added section expansion on mod/section reset
- Replaced 'Custom Construct' with 'Update Value' for mod/section resets

* Migrate Value to DefaultValue

* Show border when config property section is collapsed

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Co-authored-by: Rob B <computerguy440+gh@gmail.com>

Author: ryan-skabelund