Add full-length-name tool tip to editor file tab when name is not full length. * file-editor-tab.cc (file_editor_tab::update_window_title): Add and construct tooltip variable then signal file_name_changed() with second input string. * file-editor-tab.h (file_editor_tab::file_name_changed): Add second input string to accommodate tool tip. * file-editor.cc, file-editor.h (file_editor::handle_file_name_changed): Add second input string and set tool tip via Qt setTabToolTip() member function.

--- a/libgui/src/m-editor/file-editor-tab.h
+++ b/libgui/src/m-editor/file-editor-tab.h
@@ -86,7 +86,7 @@
   void file_has_changed (const QString& fileName);
 
 signals:
-  void file_name_changed (const QString& fileName);
+  void file_name_changed (const QString& fileName, const QString& toolTip);
   void editor_state_changed (bool copy_available, const QString& fileName);
   void tab_remove_request ();
   void add_filename_to_list (const QString& fileName);