Renamed and split undo classes from TweakBrush (#243)

I renamed the following classes:
TweakVertexWeight -> UndoStateVertexWeight
TweakBoneWeights -> UndoStateBoneWeights
TweakState -> UndoStateShape
TweakStateHolder -> UndoStateProject
TweakUndo -> UndoHistory

UndoHistory was moved into UndoHistory.h and UndoHistory.cpp.  The rest
were moved into UndoState.h.

I also renamed all of the functions in UndoHistory and most instances
of variables of any of these types.

Keeping track of TweakStroke objects was moved from TweakUndo into
wxGLPanel.  Now there is only ever one TweakStroke object.  I left
the constant re-allocation of this object in place; perhaps it should
just be re-initialized instead of re-allocated.

The state-applying functionality of TweakStateHolder::RestoreStartState,
TweakStateHolder::RestoreEndState, TweakUndo::backStroke,
TweakUndo::forwardStroke, wxGLPanel::UndoStroke, and wxGLPanel::RedoStroke
was consolidated into one function, wxGLPanel::ApplyUndoState.  I tried
not to change what this code does in any way, but the process was fairly
messy, so I could easily have made a mistake.  Hopefully the result is
much simpler and more maintainable.  Plus, it may be convenient to call
ApplyUndoState from other places in the future.

Co-authored-by: ousnius <ousnius@users.noreply.github.com>

CMakeLists.txt

@@ -70,6 +70,7 @@ set(OSsources
 	${commonsources}
 	src/components/RefTemplates.cpp
 	src/components/TweakBrush.cpp
+	src/components/UndoHistory.cpp
 	src/files/FBXWrangler.cpp
 	src/program/EditUV.cpp
 	src/program/FBXImportDialog.cpp

OutfitStudio.vcxproj

@@ -751,6 +751,8 @@
     <ClInclude Include="src\components\SliderPresets.h" />
     <ClInclude Include="src\components\SliderSet.h" />
     <ClInclude Include="src\components\TweakBrush.h" />
+    <ClInclude Include="src\components\UndoState.h" />
+    <ClInclude Include="src\components\UndoHistory.h" />
     <ClInclude Include="src\files\FBXWrangler.h" />
     <ClInclude Include="src\files\MaterialFile.h" />
     <ClInclude Include="src\files\ObjFile.h" />
@@ -817,6 +819,7 @@
     <ClCompile Include="src\components\SliderPresets.cpp" />
     <ClCompile Include="src\components\SliderSet.cpp" />
     <ClCompile Include="src\components\TweakBrush.cpp" />
+    <ClCompile Include="src\components\UndoHistory.cpp" />
     <ClCompile Include="src\files\FBXWrangler.cpp" />
     <ClCompile Include="src\files\MaterialFile.cpp" />
     <ClCompile Include="src\files\ObjFile.cpp" />

OutfitStudio.vcxproj.filters

@@ -691,6 +691,12 @@
     <ClInclude Include="src\components\TweakBrush.h">
       <Filter>Components</Filter>
     </ClInclude>
+    <ClInclude Include="src\components\UndoState.h">
+      <Filter>Components</Filter>
+    </ClInclude>
+    <ClInclude Include="src\components\UndoHistory.h">
+      <Filter>Components</Filter>
+    </ClInclude>
     <ClInclude Include="src\components\Automorph.h">
       <Filter>Components</Filter>
     </ClInclude>
@@ -1827,6 +1833,9 @@
     <ClCompile Include="src\components\TweakBrush.cpp">
       <Filter>Components</Filter>
     </ClCompile>
+    <ClCompile Include="src\components\UndoHistory.cpp">
+      <Filter>Components</Filter>
+    </ClCompile>
     <ClCompile Include="src\components\Automorph.cpp">
       <Filter>Components</Filter>
     </ClCompile>