Target options layout fixes.

* smaller icon button (waste less space)
* align manage/choose buttons

Change-Id: Idb2cb111a40353f2405cd964c2ec4f5cf8b24d78
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/debugger/debuggerprofileconfigwidget.h

@@ -65,6 +65,7 @@ public:
     void apply();
     void discard();
     bool isDirty() const;
+    QWidget *buttonWidget() const;
 
 private slots:
     void autoDetectDebugger();