Merge branch '3547_cleanup'

Merge branch '3547_cleanup'

* 3547_cleanup: (61 commits)
  Update po/mc.pot.
  Remove unneeded `struct` keyword for typedef'd structs
  src/editor/edit.c: Cleanup some compiler warnings
  src/editor/editbuffer.c: Cleanup some compiler warning
  src/editor/editwidget.c: Cleanup some compiler warnings
  (etags_set_definition_hash): refactoring:
  Add -Wassign-enum compiler wirning.
  (widget_options_t): add W_DEFAULT value to cleanup -Wassign-enum warnings.
  Add three new compiler warnings:
  Cleanup -Wfloat-conversion warning.
  (edit_block_copy_cmd): cleanup -Wconditional-uninitialized warning.
  (edit_search_fix_search_start_if_selection): cleanup -Wlogical-not-parentheses warning.
  (mc_error_message): make output format translatable.
  Find File: clarify description of exit from panelize mode.
  WPanel should report MSG_NOT_HANDLED for unhandled commands.
  Sync with gnulib 781788eeb5d4d0b816698e8629300cd90a7379bd.
  lib/widget/input.c: (quote): change type to gboolean.
  (tree_chdir, sync_tree): take vfs_path_t object to avoid double conversion of path.
  (set_display_type): ret rid of string reduplication.
  (expand_format): ret rid of extra string duplication.
  ...