Improve ellipsis buttons (#17773)

* Improve ellipsis buttons

- Remove icon font usage
- Add aria-expanded attribute

* rename function to match

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

web_src/js/features/repo-commit.js

@@ -1,9 +1,11 @@
 const {csrfToken} = window.config;
 
-export function initRepoCommitButton() {
-  $('.commit-button').on('click', function (e) {
+export function initRepoEllipsisButton() {
+  $('.ellipsis-button').on('click', function (e) {
     e.preventDefault();
+    const expanded = $(this).attr('aria-expanded') === 'true';
     $(this).parent().find('.commit-body').toggle();
+    $(this).attr('aria-expanded', String(!expanded));
   });
 }