RFI: Updates to mod options tabs

[originalfoo]

Current status: Phases 1-6 complete

Next steps:

• Do Finishing up items, then make a start on RFI: Updates to mod options tabs #1356 (comment)

First, implement a long-term stable API that other mods can use if they need access to TM:PE mod option values (in progress).

• API for external mods to query TM:PE mod options #1376

This is a summary of the changes I'm planning to make to options tabs (each numbered item represents one or more PRs):

EDIT: Phases 2, 3, 4, 5, and 6 are being done together in batches.

1. Rename the tab .cs files
   • Eg. OptionsVehicleRestrictionsTab.cs will become PoliciesTab.cs
   • The class names in those files will be updated accordingly.
   • Note: This is only change that will occur for for Keybinds tab
2. Split each group of options (and related set/update code) in to separate .cs file
   • Eg. MaintenanceTab_DespawnGroup.cs
   • Each of the "group" files will have an AddUI() method
   • The AddUI() methods will be called form parent tab MakeSettings... method
   • ...eg: MaintenanceTab_DespawnGroup.AddUI(tab);
3. Update old-style checkboxes to CheckboxOption
4. All default values will be defined in OptionsManager.LoadData()
   • At least initially... we can make further changes later if desired.
5. Use PropagatesTrueTo feature of CheckboxOption to simplify associated code
6. Remove cumbersome Set.... functions from option groups wherever possible

Finishing up:

• Add slider option UI component #1431 (review) - clear events/etc on destroy
• Refactor features, overlays, and junction option groups #1422 (comment) - better naming of load/save methods
• Mod options - further work #1452

[originalfoo]

Subsequent PRs could then tackle other issues relating to mod options (note: some of these will be touched / fixed by OP):

• Allow CheckboxOption to handle locale strings from other tables #1299
• Untangle sync of global config vs. options settings #1279
• Rename Overlay transparency to Overlay opacity #1268
• TMPE doesn't save settings changes after I quit game #1206
• tooltips for TMPE options #882
• Rounadbout and high priority road options are a mess #853
• Button to show TMPE.log in Explorer #813
• Website help button / shortcut #733
• Clickable link to documentation from inside the game #659
• Tabs in mod options... Make room for new "Bulk" tab? #652
• Use XML to save/load options. #562
• Existing vehicles struggle if Parking AI activated while they are driving? #409
• Allow main menu to set options for new games #363
  • New persistence strategy for better cross-version compatibility #1502
• Option to nuke (remove / delete) all TM:PE data in the savegame #281
• Make despawn time configurable #137
• Option Presets #69
• Changes to mod settings UI #62

[originalfoo]

Phase 1: Rename the tabs

• General Rename OptionsGeneralTab -> GeneralTab #1369
• Gameplay Rename OptionsGameplayTab -> GameplayTab #1370
• Policies Rename OptionsVehicleRestrictionsTab -> PoliciesTab #1371
• Overlays Rename OptionsOverlaysTab -> OverlaysTab #1373
• Maintenance Rename OptionsMaintenanceTab -> MaintenanceTab #1403
• Keybinds Rename OptionsKeybindsTab -> KeybindsTab #1374

[originalfoo]

Phase 2, 3, 4, 5, 6: Split out the groups, updating to CheckboxOption where possible, and other assorted cleanup:

• General -> Localisation Split some options in to GeneralTab_LocalisationGroup #1411
• General -> Interface Refactor remainder of General tab #1432
• General -> Simulation Refactor remainder of General tab #1432
• General -> Compatibility Refactor remainder of General tab #1432
• Gameplay -> Vehicle Behaviour Split some options in to GameplayTab_VehicleBehaviourGroup #1416
• Gameplay -> Advanced Vehicle AI Refactor remainder of Gameplay tab #1435
• Gameplay -> Parking AI Refactor remainder of Gameplay tab #1435
• Gameplay -> Public Transport Refactor remainder of Gameplay tab #1435
• Policies -> At Junctions Refactor features, overlays, and junction option groups #1422
• Policies -> On roads Refactor remainder of Policies tab groups #1455
• Policies -> On highways Refactor remainder of Policies tab groups #1455
• Policies -> In emergencies Refactor remainder of Policies tab groups #1455
• Policies -> Roundabouts Refactor remainder of Policies tab groups #1455
• Policies -> High Priority Roads Refactor remainder of Policies tab groups #1455
• Overlays -> Overlays Refactor features, overlays, and junction option groups #1422
• Maintenance -> Tools Refactor features, overlays, and junction option groups #1422
• Maintenance -> Features Refactor features, overlays, and junction option groups #1422
• Maintenance -> Despawn
• Maintenance -> Configuration Refactor features, overlays, and junction option groups #1422

[originalfoo]

Remainder of work will continue in 11.6.6.0 branch.