Qml&Js: properties/methods/enums inspection

.. of builtIn qml and cpp code over "Inspect API For Element Under
Cursor" action.

Change-Id: I70d5bec2933b682295c5242248a2b0f95dba4e76
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>

src/plugins/qmljseditor/qmljseditor.h

@@ -75,6 +75,9 @@ public:
 
     TextEditor::AssistInterface *createAssistInterface(TextEditor::AssistKind assistKind,
                                                         TextEditor::AssistReason reason) const;
+
+    void inspectElementUnderCursor() const;
+
 public slots:
     void findUsages();
     void renameUsages();