Fixes #1528. Stores the currently selected tags locally before synchronizing with the server and restores them after the new user object comes back down the pipe. One potential issue that should probably be fixed is if a tag is deleted on another client that has it selected, there is no visual feedback showing that a tag is still selected, but there are no tasks shown because a null tag is selected. This is fixed by pressing "clear filters", but null filters should probably be checked eventually