ImDrawList: moved cold fields lower in the structure so hot fields are closer to each others + better packed ImGuiNavItemData

imgui.h

@@ -2723,15 +2723,15 @@ struct ImDrawList
     // [Internal, used while building lists]
     unsigned int            _VtxCurrentIdx;     // [Internal] generally == VtxBuffer.Size unless we are past 64K vertices, in which case this gets reset to 0.
     ImDrawListSharedData*   _Data;              // Pointer to shared draw data (you can use ImGui::GetDrawListSharedData() to get the one from current ImGui context)
-    const char*             _OwnerName;         // Pointer to owner window's name for debugging
     ImDrawVert*             _VtxWritePtr;       // [Internal] point within VtxBuffer.Data after each add command (to avoid using the ImVector<> operators too much)
     ImDrawIdx*              _IdxWritePtr;       // [Internal] point within IdxBuffer.Data after each add command (to avoid using the ImVector<> operators too much)
-    ImVector<ImVec4>        _ClipRectStack;     // [Internal]
-    ImVector<ImTextureID>   _TextureIdStack;    // [Internal]
     ImVector<ImVec2>        _Path;              // [Internal] current path building
     ImDrawCmdHeader         _CmdHeader;         // [Internal] template of active commands. Fields should match those of CmdBuffer.back().
     ImDrawListSplitter      _Splitter;          // [Internal] for channels api (note: prefer using your own persistent instance of ImDrawListSplitter!)
+    ImVector<ImVec4>        _ClipRectStack;     // [Internal]
+    ImVector<ImTextureID>   _TextureIdStack;    // [Internal]
     float                   _FringeScale;       // [Internal] anti-alias fringe is scaled by this value, this helps to keep things sharp while zooming at vertex buffer content
+    const char*             _OwnerName;         // Pointer to owner window's name for debugging
 
     // If you want to create ImDrawList instances, pass them ImGui::GetDrawListSharedData() or create and use your own ImDrawListSharedData (so you can use ImDrawList without ImGui)
     ImDrawList(ImDrawListSharedData* shared_data) { memset(this, 0, sizeof(*this)); _Data = shared_data; }