* Remove duplicate backend columns
* Remove duplicate column routines
* Move columns on frontend from state to model
* Generate available columns from Colum enum
* Add second column label for notes mode
Like notetypes, there is a col.get_deck() routine which caches
fetches, so that successive fetches are cheap. This makes it simpler
to just fetch the deck at the start.
We were also attempting to fetch a deck with id 0 for each row; I've
changed this so that we only fetch it if the id is non-zero.
I18n uses an Arc internally, so it is cheap to clone. This allow us
to drop the lifetime specifiers on the context structures.
I think this may have accidentally been changed in the refactoring.
If we discard self._rows, it will result in the entire table flashing
"..." until the new data is available. Instead, we leave the cached
rows alone, and just update the cutoff point, so we can serve stale
content (avoiding any visible redraw) until the new data is available.
I've updated search() to reset the rows there, so we free up memory
on a new search.
The backend knows exactly which op has executed, and it saves us having
to re-implement this logic on each client.
Fixes the browser table refreshing when toggling decks.
Instances can pass handled_by=self to more easily ignore events they
initiate.
Fixes ugly refresh when expanding/collapsing decks, but we're still
refreshing the card/notes area unnecessarily in that case.
Updating a deck via protobuf is now exposed on the backend, but not
currently on the frontend - I suspect we'll be better off writing
separate routines for the actions we need instead, and we get a better
undo description for free.
This is currently causing an ugly redraw in the browse screen, which
will need fixing.
