A feedback message should be displayed when user bookmarks documents from the Content tab of a workspace

Currently, the "document bookmarked" feedback message is displayed only when user bookmarks the document from the document's Bookmark tab.
When user selects the document from the workspace Content tab, clicks on the Bookmark button and bookmarks the document(s) from this view he's displayed no feedback message. He has to unfold the bookmark folder tree to see if the document(s) were actually bookmarked or not.