opensubtitles: Re-fix blank dialogue (and traceback)
Traceback (most recent call last):
File "/usr/lib/python3.11/site-packages/gi/overrides/Gtk.py", line 85, in _builder_connect_callback
handler, args = _extract_handler_and_args(obj_or_map, handler_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/gi/_gtktemplate.py", line 34, in _extract_handler_and_args
raise AttributeError('Handler %s not found' % handler_name)
AttributeError: Handler Gtk.Widget.hide_on_delete not found
Fixes: f2ae04f3 ("opensubtitles: Fix blank dialogue when reopened")