plasmoid:show separator actions only for launchers

plasmoid/package/contents/ui/ContextMenu.qml

@@ -827,6 +827,7 @@ PlasmaComponents.ContextMenu {
     PlasmaComponents.MenuItem {
         id: addInternalSeparatorItem       
         enabled: !visualParent.tailItemIsSeparator || !visualParent.headItemIsSeparator
+        visible: visualParent.hasShownLauncher
         icon: "add"
         text: !visualParent.tailItemIsSeparator ? i18n("Add Tail Separator") : i18n("Add Head Separator")
 

plasmoid/package/contents/ui/abilities/Launchers.qml

@@ -203,7 +203,7 @@ Item {
     function inCurrentActivity(launcherUrl) {
         var activities = _launchers.tasksModel.launcherActivities(launcherUrl);
 
-        if (activities.length === 0 || activities.indexOf(_NULLACTIVITYID_) !== -1 || activities.indexOf(activityInfo.currentActivity) !== -1) {
+        if (activities.indexOf(_NULLACTIVITYID_) !== -1 || activities.indexOf(activityInfo.currentActivity) !== -1) {
             return true;
         }
 

plasmoid/package/contents/ui/task/TaskItem.qml

@@ -136,6 +136,9 @@ Item {
     readonly property bool isHidden: !visible || isForcedHidden
     property bool isForcedHidden: false
     property bool isLauncher: (IsLauncher === true) ? true : false
+    property bool hasShownLauncher:  (launchers.inCurrentActivity(taskItem.launcherUrl)
+                                     || launchers.inCurrentActivity(taskItem.launcherUrlWithIcon))
+                                     && !root.inActivityChange /*update trigger when changing current activity*/
     property bool isMinimized: (IsMinimized === true) ? true : false
     property bool isSeparator: false
     property bool isStartup: (IsStartup === true) ? true : false
@@ -1234,9 +1237,6 @@ Item {
         launchers.launcherRemoved.connect(onLauncherChanged);
         parabolic.sglClearZoom.connect(sltClearZoom);
 
-        var hasShownLauncher = ((tasksModel.launcherPosition(taskItem.launcherUrl) !== -1)
-                                || (tasksModel.launcherPosition(taskItem.launcherUrlWithIcon) !== -1) );
-
         //startup without launcher
         var hideStartup =  ((!hasShownLauncher || !taskItem.launchers.inCurrentActivity(taskItem.launcherUrl))
                             && taskItem.isStartup);