Better editor undo redo (#176)

* BetterEditorUndoRedo : Exploratory fix for undo/redo state, doesn't work because of VesselCrewManifest side effects
See #172

* BetterEditorUndoRedo : functional, obvious issues fixed, still likely to cause side effects.

* disable BetterEditorUndoRedo by default

---------

Co-authored-by: JonnyOThan <jonnyothan@gmail.com>

GameData/KSPCommunityFixes/Settings.cfg

@@ -276,6 +276,11 @@ KSP_COMMUNITY_FIXES
   // Add part actions for locking/unlocking part resources flow state.
   ResourceLockActions = true
 
+  // Invert the editor undo state capturing logic so part tweaks aren't lost when undoing.
+  // This is disabled by default due to the high likelihood of adverse interactions with mods.
+  // It may be enabled in the future after wider testing.
+  BetterEditorUndoRedo = false
+
   // ##########################
   // Performance tweaks
   // ##########################

KSPCommunityFixes/KSPCommunityFixes.csproj

@@ -172,6 +172,7 @@
     <Compile Include="Performance\PQSUpdateNoMemoryAlloc.cs" />
     <Compile Include="Performance\ProgressTrackingSpeedBoost.cs" />
     <Compile Include="QoL\AutostrutActions.cs" />
+    <Compile Include="QoL\BetterEditorUndoRedo.cs" />
     <Compile Include="QoL\ToolbarShowHide.cs" />
     <Compile Include="QoL\DisableNewGameIntro.cs" />
     <Compile Include="QoL\NoIVA.cs" />