Ticket #3142: fix file out-of-date-ness check on saving.

The code depended on the execution and outcome of the hardlink check.
This was bogus - the two checks have nothing in common except the stat()
call they both depend on.
Merge branch '3142_edit_save_check_out_of_date'

* 3142_edit_save_check_out_of_date:
  Ticket #3142: fix file out-of-date-ness check on saving.
Ticket #2274: adjust script permissions to installed ones.
Merge branch '2274_perms_fix'

* 2274_perms_fix:
  Ticket #2274: adjust script permissions to installed ones.
Ticket #3157: unify panel sort arrow's direction.

Fix inconsistency of the arrow's direction in the panel header line
across skins.
Change default value of "sort-sign-down" from "," (comma) to "." (dot).

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Merge branch '3157_panel_sort_sign'

* 3157_panel_sort_sign:
  Ticket #3157: unify panel sort arrow's direction.