The public header file ModelingToolsEditorModeToolkit.h exposes private module definition of ENABLE_STYLUS_SUPPORT

This was reported on EPS in UE 5.5, but the issue is still in main at CL 49865562

The file /Engine/Plugins/Editor/ModelingToolsEditorMode/Source/ModelingToolsEditorMode/ModelingToolsEditorMode.Build.cs adds a private definition for ENABLE_STYLUS_SUPPORT:

PrivateDefinitions.Add("ENABLE_STYLUS_SUPPORT=" + (Target.Platform == UnrealTargetPlatform.Win64 ? '1' : '0')); 

But ENABLE_STYLUS_SUPPORT is used in the public header files: Engine/Plugins/Editor/ModelingToolsEditorMode/Source/ModelingToolsEditorMode/Public/ModelingToolsEditorModeToolkit.h

The customer includes the public file ModelingToolsEditorModeToolkit.h in there code, but the ENABLE_STYLUS_SUPPORT is not defined in that context. So they have to define it manually on their side to compile their code.