- Removed all jQuery AJAX calls and replaced with our fetch wrapper
- Tested the locale change functionality and it works as before
- Tested the delete button functionality and it works as before
# Demo using `fetch` instead of jQuery AJAX
![action](https://github.com/go-gitea/gitea/assets/20454870/8a024f75-c2a5-4bff-898d-ca751d2489f1)
Signed-off-by: Yarden Shoham <git@yardenshoham.com>
(cherry picked from commit 8a0a83a1b53f55bcc710c3b229cba1c1bcf471c6)