* src/widgets/modest-attachments-view.[ch]:

        * Implemented new signal that notifies everytime the selection
          is changed.
* src/maemo/modest-msg-edit-window.c:
        * Execute dimming rules on attachments selection change. This
          way we properly update remove attachment status.
* src/modest-ui-dimming-rules.c:
        * Now we only dim editor remove attachments action if
          there are no selected attachments (fixes NB#78873).

pmo-trunk-r4026