* src/widgets/modest-header-view-render.c:

* src/widgets/modest-header-view-render.c:
        * Now we escape the subjects to be added to the header subject
          cell, to prevent some warnings.
* src/modest-ui-actions.c:
        * (modest_ui_actions_on_delete_message): now we check if
          selection is empty to unselect it. We got the selection in
          main window case, but in message window selection is
          always NULL. We prevent a warning this way.
        * (new_messages_arrived): if new_headers is NULL, we don't show
          a warning.
* src/maemo/modest-msg-view-window.c:
        * (modest_msg_view_window_get_header): if the row reference is
          not valid, we return NULL without warnings.
        * (message_reader): now it uses a row reference instead of a
          path. This way the reference is valid even after deleting
          messages. This way deletion does not break the row references.
          And this way after deleting a message in viewer, the next
          message shown and the one you would delete are the same
          (fixes NB#63937). We use now row reference for all things
          related to retrieval of messages.
* src/modest-mail-operation.c:
        * Minor change.
* src/modest-ui-dimming-rules.c:
        * (_define_msg_view_window_dimming_state): if the header of the
          message view is NULL, we don't show a warning (happens on
          loading a new message to view).

pmo-trunk-r3316