Epic: Settings

[LukeNexusMods]

For work related to the settings page.
Discussion to be had around what the settings page will do and what options are needed.

• Settings - Implement Settings Backend #396
• Settings - Move existing settings to the new settings backend #1189
• Settings - Persist and load settings from a backend (data store and/or JSON file) #1190
• Implement Settings UI #920
• Add JsonStore and slim startup settings manager #1243
• Add settings sections #1370
• Assign sections to settings #1571
• Add number input control to settings #1373
• Style ComboBox #1371
• Add Dialog on save press in there are changes that need user to restart (Add user confirmation on page close #1372)
• Highlight modified settings in the UI (settings that no longer have the default value)
• Add button to reset to default value in case of modified
• Add Dialog for Cancel button (You have unsaved changes)
• Filter search
• Add developer docs on how to add new settings, before DI settings, and new setting UIs
• Settings: support scoped settings #2303
• Settings manager is persisting setting override values #1422