Wizards: Add empty QML_DESIGNER_IMPORT_PATH to templates

QML_DESIGNER_IMPORT_PATH can be used to create "mockup" QML files,
just for Qt Quick Designer.

Change-Id: Icd0c4143031a4b49afb89a2465622bdf2376745f
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

share/qtcreator/templates/wizards/projects/qmake/qtquickapplication/app.pro

@@ -10,6 +10,9 @@ RESOURCES += qml.qrc
 # Additional import path used to resolve QML modules in Qt Creator's code model
 QML_IMPORT_PATH =
 
+# Additional import path used to resolve QML modules just for Qt Quick Designer
+QML_DESIGNER_IMPORT_PATH =
+
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin
 else: unix:!android: target.path = /opt/$${TARGET}/bin

share/qtcreator/templates/wizards/projects/qmake/qtquickcontrols2application/app.pro

@@ -9,6 +9,9 @@ RESOURCES += qml.qrc
 # Additional import path used to resolve QML modules in Qt Creator's code model
 QML_IMPORT_PATH =
 
+# Additional import path used to resolve QML modules just for Qt Quick Designer
+QML_DESIGNER_IMPORT_PATH =
+
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin
 else: unix:!android: target.path = /opt/$${TARGET}/bin

share/qtcreator/templates/wizards/projects/qmake/qtquickcontrolsapplication/app.pro

@@ -15,6 +15,9 @@ RESOURCES += qml.qrc
 # Additional import path used to resolve QML modules in Qt Creator's code model
 QML_IMPORT_PATH =
 
+# Additional import path used to resolve QML modules just for Qt Quick Designer
+QML_DESIGNER_IMPORT_PATH =
+
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin
 else: unix:!android: target.path = /opt/$${TARGET}/bin