Implement watched toggle for films in details modal

- Watched status is stored in the local database
- Gave details modals a set size
- Added a for now useless play button to film details modal

src/persist/sqlite_manager.rs

@@ -79,9 +79,10 @@ impl SqliteManager {
         move |connection| {
           connection.execute(
             "
-              update watched_status
-              set watched = :watched
-              where watched_status.media_uuid is :uuid
+              insert into watched_status (media_uuid, watched)
+              values (:uuid, :watched)
+              on conflict (media_uuid) do
+                update set watched = :watched
             ",
             named_params! { ":uuid": uuid, ":watched": watched },
           )?;