Kirigami: Don't show two drawer items

One just on Android, the other for the rest

mobile/app/package/contents/ui/main.qml

@@ -45,13 +45,15 @@ Kirigami.AbstractApplicationWindow {
             Kirigami.Action {
                 text: i18n("Open...")
                 icon.name: "document-open"
+                visible: Qt.platform.os !== "android"
                 onTriggered: {
                     fileDialog.open()
                 }
             },
             Kirigami.Action {
-                text: i18n("Open Android...")
+                text: i18n("Open...")
                 icon.name: "document-open"
+                visible: p0.enabled
                 readonly property var p0: Connections {
                     target: AndroidInstance
                     enabled: AndroidInstance.hasOwnProperty("openFile")