fix #25 by allowing user to close model windows while backend is busy

Signed-off-by: galeon <dertiellis@gmail.com>

BuildsDialog.qml

@@ -15,8 +15,9 @@ Dialog {
     padding: 0
     width: 880
     height: 600
-    closePolicy: buildsDialog.backend.switching ? Popup.NoAutoClose
-                                                : Popup.CloseOnEscape | Popup.CloseOnPressOutside
+    closePolicy: Popup.CloseOnEscape | Popup.CloseOnPressOutside
+    //closePolicy: buildsDialog.backend.switching ? Popup.NoAutoClose
+    //                                            : Popup.CloseOnEscape | Popup.CloseOnPressOutside
 
     background: Rectangle {
         color: "#1e1e1e"