* src/widgets/modest-main-window.h

   * src/widgets/modest-main-window.h
   * src/widgets/modest-main-window.c
   (modest_main_window_transfer_mode_enabled):
   Checks whether the main window is in transfer mode.
   (set_toolbar_mode):
   Checks dimming rules when changing toolbar mode

* src/modest-ui-dimming-rules.c
   (modest_ui_dimming_rules_on_delete_folder):
   Dim "delete folder" if the main window is in transfer mode
   (_transfer_mode_enabled):
   Added support for the main window

   Fixes NB#64604

pmo-trunk-r3064