Ticket #2076: make copy/move/delete progress dialog wider.

Initial step: get rid of hardcoded width of progress bar.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Copy/move/delete progress dialog occupies at least 2/3 of screen width.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
WHLine: allow draw text over horizontal line.

  * (hline_set_text): new function.
  * (file_progress_show_total): use hline_set_text to show processed
  files counter.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Merge branch '2076_copy_progress_width'

* 2076_copy_progress_width:
  WHLine: allow draw text over horizontal line.
  Copy/move/delete progress dialog occupies at least 2/3 of screen width.
  Ticket #2076: make copy/move/delete progress dialog wider.