Clean up initialization logic of localization gallery

[bctcvai]

There is a lot of serialization of parallel operations and a few redundant fetches in the initialization of the localization gallery page.

There appears to be a lot of layers + data model abstractions unique to this page. This appears to be the root cause of the problems, generally it doesn't seem required to call rest/Project or rest/StateTypes multiple times per page load nor required to wait for the completion of one before starting the next.