Use gtk_dialog_run() to run the key input dialog, which is modal anyway.
This avoids having to pass the label and the iter around for the dialog
response callback to have them, as they now only are used directly in the
function setting them in the first place.
This however doesn't get rid of any of the global data itself, it only pack it
in a struct and passes pointer to this struct around instead of accessing the
global whenever possible.
Apparently the ::unrealize symbol is sent too late, after we destroyed
the widget and freed the GeanyDocument, and some signals like
::focus-in-event can still be fired on the widget after that.
So, properly use the ::destroy signal that is supposed to be fired when
others should release references to that instance.
This also makes recent GCC shut up about indexing below the bounds as
it detected the code checked for a negative index yet didn't guard the
actual access. For now GCC doesn't understand the more comprehensive
check, but it might come back if GCC becomes smart enough.
Anyway, this makes the Assert() more correct, and addition of the
explicit kinds array size makes sure any future kind addition won't
miss its entry.
Rust now allows CRLF line endings in source files, which doesn't actually
change any lexing here but the comment was wrong.
Also, the hashbang initial comment has a special case where #
