Default to enable the workflow option that will minimize what goes into the unsaved asset list after a Blueprint class default value change.

Notes:
- This also moves the option out of the "Experimental" section in Blueprint Editor settings.

#jira UE-179809
#rb None (trivial)
#preflight None (trivial)

[CL 25240078 by phillip kavan in ue5-main branch]

Engine/Source/Editor/BlueprintGraph/Private/BlueprintEditorSettings.cpp

@@ -55,9 +55,9 @@ UBlueprintEditorSettings::UBlueprintEditorSettings(const FObjectInitializer& Obj
 	, bEnableNamespaceEditorFeatures(true)
 	, bEnableContextMenuTimeSlicing(true)
 	, ContextMenuTimeSlicingThresholdMs(50)
+	, bDoNotMarkAllInstancesDirtyOnDefaultValueChange(true)
 	// Experimental
 	, bFavorPureCastNodes(false)
-	, bDoNotMarkAllInstancesDirtyOnDefaultValueChange(false)
 	// Compiler Settings
 	, SaveOnCompile(SoC_Never)
 	, bJumpToNodeErrors(false)