Add xfce_dialog_show_help_with_version().

Allow applications to send their own version string to the wiki
help.php script.
I18n: Update translation hr (100%).

164 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
Updates for release.
Post release tag bump
I18n: Update translation sv (100%).

164 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).