Updates the VariableInspector, VariableGroup and VariableField objects to actually be useful. In addition to the original functionality of being able to have a var name passed in and search for all vars with that in it, it also lets you build out a completely custom Inspector.

Unlike the regular Inspector, which requires a specific object or objects, from which the fields are pulled from, this lets you manually create fields, which can tie into any given object and their fields, global vars, and also not only supports the engine types for fields, but also triggers a callback to script if a field type is not found allowing fully custom fields to be handled as needed.

Engine/source/console/consoleObject.h

@@ -475,6 +475,7 @@ public:
       FIELD_HideInInspectors     = BIT( 0 ),    ///< Do not show the field in inspectors.
       FIELD_ComponentInspectors = BIT(1),       ///< Custom fields used by components. They are likely to be non-standard size/configuration, so 
                                                 ///< They are handled specially
+      FIELD_CustomInspectors = BIT(2),          ///< Display as a button in inspectors.
    };
 
    struct Field