[l10n] Updated Catalan translation
[l10n] Updated Catalan (Valencian) translation
Completion: remove block_count struct field

It is already handled by g_signal_handler_block/unblock().
Completion: little clean-up of activate_current_proposal()
Clean-up in the completion utils

Some functions are used only internally, so make them static.
And get_word() was used nowhere.