Also display "recently pushed branch" alert on PR view (#35001)

This commit adds the "You recently pushed to branch X" alert also to PR
overview, as opposed to only the repository's home page.

GitHub also shows this alert on the PR list, as well as the home page.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>

models/repo/repo.go

@@ -652,7 +652,13 @@ func (repo *Repository) AllowsPulls(ctx context.Context) bool {
 }
 
 // CanEnableEditor returns true if repository meets the requirements of web editor.
+// FIXME: most CanEnableEditor calls should be replaced with CanContentChange
+// And all other like CanCreateBranch / CanEnablePulls should also be updated
 func (repo *Repository) CanEnableEditor() bool {
+	return repo.CanContentChange()
+}
+
+func (repo *Repository) CanContentChange() bool {
 	return !repo.IsMirror && !repo.IsArchived
 }