#14104 Remember user-defined size of property and preferences dialogs

Persist the geometry of PdmUiPropertyViewDialog and RiuPropertyViewTabWidget to the application settings on close and restore it on the next show. Restoring is done in showEvent rather than the constructor so it is applied reliably for a modal dialog. The settings key includes the bound object class keyword so distinct dialogs that share a window title do not collide.

This behaviour is gated behind a new "Remember Dialog Size" experimental feature, disabled by default. PdmUiPropertyViewDialog cannot access RiaPreferencesSystem, so the application pushes the current setting via the static enableGeometryPersistence(), following the existing pattern used for class-name display. RiuPropertyViewTabWidget queries the feature directly.

ApplicationLibCode/Application/RiaGuiApplication.cpp

@@ -118,6 +118,7 @@
 #include "cafEffectGenerator.h"
 #include "cafFixedAtlasFont.h"
 #include "cafPdmUiModelChangeDetector.h"
+#include "cafPdmUiPropertyViewDialog.h"
 #include "cafPdmUiTreeView.h"
 #include "cafProgressInfo.h"
 #include "cafQTreeViewStateSerializer.h"
@@ -1469,6 +1470,8 @@ void RiaGuiApplication::applyGuiPreferences( const RiaPreferences*
         caf::EffectGenerator::setRenderingMode( caf::EffectGenerator::FIXED_FUNCTION );
     }
 
+    caf::PdmUiPropertyViewDialog::enableGeometryPersistence( RiaPreferencesSystem::current()->isFeatureEnabled( "remember-dialog-size" ) );
+
     if ( m_mainWindow )
     {
         for ( auto& tv : m_mainWindow->projectTreeViews() )