Changing material component property inspector to dockable view pane

• Inspector is locked to a specific entity and material assignment ID
• All modifications are made via the material component request bus
• Removed complicated configuration management in editor material component
• Multiple material property inspectors can be opened
• Multiple materials across different entities can be edited simultaneously
• No longer blocks the viewport or other interactions
• Added functions to material component request bus for retrieving material slot labels, default materials, getting and setting property and UV overrides
• Added more asset related types to material property value conversion from any
• Added support for static heading widget on top of atom tools inspector, currently used for menus and messages

WIP: Still investigating intermittent crash because of corrupt asset property
Signed-off-by: Guthrie Adams <guthadam@amazon.com>

Gems/Atom/Tools/AtomToolsFramework/Code/Include/AtomToolsFramework/Inspector/InspectorRequestBus.h

@@ -24,6 +24,12 @@ namespace AtomToolsFramework
         static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
         typedef AZ::Uuid BusIdType;
 
+        //! Add heading widget above scroll area
+        virtual void AddHeading(QWidget* headingWidget) = 0;
+
+        //! Clear heading widgets
+        virtual void ClearHeading() = 0;
+
         //! Clear all inspector groups and content
         virtual void Reset() = 0;
 

Gems/Atom/Tools/AtomToolsFramework/Code/Include/AtomToolsFramework/Inspector/InspectorWidget.h

@@ -41,6 +41,10 @@ namespace AtomToolsFramework
         ~InspectorWidget() override;
 
         // InspectorRequestBus::Handler overrides...
+        void AddHeading(QWidget* headingWidget) override;
+
+        void ClearHeading() override;
+
         void Reset() override;
 
         void AddGroupsBegin() override;
@@ -77,7 +81,6 @@ namespace AtomToolsFramework
         virtual void OnHeaderClicked(const AZStd::string& groupNameId, QMouseEvent* event);
 
     private:
-        QVBoxLayout* m_layout = nullptr;
         QScopedPointer<Ui::InspectorWidget> m_ui;
 
         struct GroupWidgetPair