* convert statuses.visibility and notifications.notification_type columns from type string -> int for performance / space savings
* fix test trying to compare string to int
* fix instance count query using string literal instead of gtsmodel const type
* ensure a default value is always set
* also migrate the account settings and sin bin status tables
* initialize maps outside loops and place into singular enum mapping creation func
* use int16 for enum types
* update sinbinstatus creation to be from a snapshot at initial creation
* add snapshot of poll type at creation time
* [feature/frontend] Add options to include Unlisted posts or hide all posts
* finish up
* swagger
* move invalidate call into bundb package, avoid invalidating if not necessary
* rename show_web_statuses => web_visibility
* don't use ptr for webvisibility
* last bits
* [feature] User sign-up form and admin notifs
* add chosen + filtered languages to migration
* remove stray comment
* chosen languages schmosen schmanguages
* proper error on local account missing
* [feature] User-selectable preset themes
* docs, more theme stuff
* lint, tests
* fix css name
* correct some little issues
* add another theme
* fix poll background
* okay last theme i swear
* make retrieval of apimodel themes more conventional
* preallocate stylesheet slices
