Gojira

This PR is to add additional support for JIRA integration with ETT. It is still raw, and views are non-existent yet.

It also contains some minor fixes in the settings view where unchecking a box had no effect.

Views and more controller logic will be added in future PRs.

This PR shouldn't affect anything on ETT since most (all?) of the jira stuff are still hidden.

I also wanted to merge that stuff because I thought that trying to merge stuff from master would become harder the longer we delay that PR.

Thanks to @FranciscoCanas and @mtjandra for working on this! Greatly appreciated!