Index: sources/gui/qml/components/HeaderBarPopup.qml
===================================================================
diff -u -r0fc32e1796c9fe40ff0e83b4fe039be67ce6dd39 -reaa3d39aafad6579b00a7bb06e765b4e5a99ab0f
--- sources/gui/qml/components/HeaderBarPopup.qml	(.../HeaderBarPopup.qml)	(revision 0fc32e1796c9fe40ff0e83b4fe039be67ce6dd39)
+++ sources/gui/qml/components/HeaderBarPopup.qml	(.../HeaderBarPopup.qml)	(revision eaa3d39aafad6579b00a7bb06e765b4e5a99ab0f)
@@ -18,6 +18,11 @@
      * \param   vButton     - Headerbar icon button
      */
     function openDialog     ( vButton ) {
+        if ( visible ) {
+            close()
+            return
+        }
+
         button = vButton
         adjustPosition(button)
         open()