Reduced required QtQuick.Dialogs version

fancontrol-gui/package/contents/ui/Application.qml

@@ -20,7 +20,7 @@
 
 import QtQuick 2.4
 import QtQuick.Controls 1.3
-import QtQuick.Dialogs 1.3
+import QtQuick.Dialogs 1.2
 import QtQuick.Layouts 1.1
 import QtQml 2.8
 import Fancontrol.Gui 1.0 as Gui