Clangformat: Brings back some of checkboxes

Brought back checkboxes: format while typing, format on save.
Brought back format while typing feature.
Global checkboxes will be hidden in project settings,
and visible for global.

Change-Id: I193cf9e13b10de22091edb5fe04aef957dd74586
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/clangformat/clangformatindenter.h

@@ -40,6 +40,7 @@ public:
 
 private:
     bool formatCodeInsteadOfIndent() const override;
+    bool formatWhileTyping() const override;
     int lastSaveRevision() const override;
 };