Remove "Delete this page" and "Forget about this site" from livemarks.

These context menu entries should not be present on live bookmarks
because they make no sense for feed entries.
This resolves #663.

application/basilisk/components/places/content/controller.js

@@ -461,7 +461,11 @@ PlacesController.prototype = {
             if (parentNode) {
               if (PlacesUtils.nodeIsTagQuery(parentNode))
                 nodeData["tagChild"] = true;
-              else if (this.hasCachedLivemarkInfo(parentNode))
+            }
+          } else {
+            var parentNode = node.parent;
+            if (parentNode) {
+              if (this.hasCachedLivemarkInfo(parentNode))
                 nodeData["livemarkChild"] = true;
             }
           }

application/basilisk/components/places/content/placesOverlay.xul

@@ -198,7 +198,7 @@
               accesskey="&cmd.delete.accesskey;"
               closemenu="single"
               selection="link"
-              forcehideselection="bookmark"/>
+              forcehideselection="bookmark|livemarkChild"/>
     <menuitem id="placesContext_deleteHost"
               command="placesCmd_deleteDataHost"
               label="&cmd.deleteDomainData.label;"
@@ -207,7 +207,7 @@
               selection="link|host"
               selectiontype="single"
               hideifprivatebrowsing="true"
-              forcehideselection="bookmark"/>
+              forcehideselection="bookmark|livemarkChild"/>
     <menuseparator id="placesContext_deleteSeparator"/>
     <menuitem id="placesContext_sortBy:name"
               command="placesCmd_sortBy:name"

application/palemoon/components/places/content/controller.js

@@ -444,7 +444,11 @@ PlacesController.prototype = {
             if (parentNode) {
               if (PlacesUtils.nodeIsTagQuery(parentNode))
                 nodeData["tagChild"] = true;
-              else if (this.hasCachedLivemarkInfo(parentNode))
+            }
+          } else {
+            var parentNode = node.parent;
+            if (parentNode) {
+              if (this.hasCachedLivemarkInfo(parentNode))
                 nodeData["livemarkChild"] = true;
             }
           }

application/palemoon/components/places/content/placesOverlay.xul

@@ -203,7 +203,7 @@
               accesskey="&cmd.delete.accesskey;"
               closemenu="single"
               selection="link"
-              forcehideselection="bookmark"/>
+              forcehideselection="bookmark|livemarkChild"/>
     <menuitem id="placesContext_deleteHost"
               command="placesCmd_deleteDataHost"
               label="&cmd.deleteDomainData.label;"
@@ -212,7 +212,7 @@
               selection="link|host"
               selectiontype="single"
               hideifprivatebrowsing="true"
-              forcehideselection="bookmark"/>
+              forcehideselection="bookmark|livemarkChild"/>
     <menuseparator id="placesContext_deleteSeparator"/>
     <menuitem id="placesContext_reload"
               command="placesCmd_reload"