Add attachments for PR reviews (#16075)

* First step for multiple dropzones per page.

* Allow attachments on review comments.

* Lint.

* Fixed accidental initialize of the review textarea.

* Initialize SimpleMDE textarea.

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

models/issue_comment.go

@@ -762,6 +762,8 @@ func updateCommentInfos(e *xorm.Session, opts *CreateCommentOptions, comment *Co
 			}
 		}
 		fallthrough
+	case CommentTypeReview:
+		fallthrough
 	case CommentTypeComment:
 		if _, err = e.Exec("UPDATE `issue` SET num_comments=num_comments+1 WHERE id=?", opts.Issue.ID); err != nil {
 			return err