Backport #16775
Gitea has relied on some slow JS code to match up added and deleted lines on the
diff pages. This can cause a considerable slow down on large diff pages.
This PR makes a small change meaning that the matching up can occur much more simply.
Partial fix#1351
Signed-off-by: Andrew Thornton <art27@cantab.net>
Fixed#8861
* use ajax on PR review page
* handle review comments
* extract duplicate code
FetchCodeCommentsByLine was initially more or less copied from fetchCodeCommentsByReview. Now they both use a common findCodeComments function instead
* use the Engine that was passed into the method
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Lauris BH <lauris@nix.lv>
* Move diff split code into own template file
Separate split diff view same as unified already is. Mainly because I'm working on a separate PR with this change and merge conflicts for each change to box.tmpl are annoying and I'm worried about breaking something subtle while trying to resolve them.
* Fix error
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
