For some reason our eslint configuration is not working correctly
and a bug has become apparent when trying to backport this to 1.12.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

Move EventSource to use a SharedWorker. This prevents issues with HTTP/1.1
open browser connections from preventing gitea from opening multiple tabs.

Also allow setting EVENT_SOURCE_UPDATE_TIME to disable EventSource updating

Fix #11978

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

Should eliminate a error in the Firefox console regarding the connection
being interrupted while the page was loading.

If the browser supports EventSource switch to use this instead of
polling notifications.

Signed-off-by: Andrew Thornton art27@cantab.net

* Use AJAX for notifications table

Signed-off-by: Andrew Thornton <art27@cantab.net>

* move to separate js

Signed-off-by: Andrew Thornton <art27@cantab.net>

* placate golangci-lint

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add autoupdating notification count

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Fix wipeall

Signed-off-by: Andrew Thornton <art27@cantab.net>

* placate tests

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Try hidden

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Try hide and hidden

Signed-off-by: Andrew Thornton <art27@cantab.net>

* More auto-update improvements

Only run checker on pages that have a count
Change starting checker to 10s with a back-off to 60s if there is no change

Signed-off-by: Andrew Thornton <art27@cantab.net>

* string comparison!

Signed-off-by: Andrew Thornton <art27@cantab.net>

* as per @silverwind

Signed-off-by: Andrew Thornton <art27@cantab.net>

* add configurability as per @6543

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add documentation as per @6543

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Use CSRF header not query

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Further JS improvements

Fix @etzelia update notification table request
Fix @silverwind comments

Co-Authored-By: silverwind <me@silverwind.io>
Signed-off-by: Andrew Thornton <art27@cantab.net>

* Simplify the notification count fns

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: silverwind <me@silverwind.io>