Fix cancel button in the page of project edit not work (#23655)

[sillyguodong]

Backport #23655

Before, in project edit page, the cancel button is not work.

Screen.Recording.2023-03-23.at.17.55.08.mov

1. The wrong classname cancel was added to the <a> tag. That classname caused the default click event of <a> tag to be cancelled. Because we have the following settings in the global. So I remove the classname cancel.

gitea/web_src/js/features/common-global.js

Lines 325 to 327 in 9be90a5

	$(document).on('click', 'form .ui.cancel.button', (e) => {
	e.preventDefault();
	});

2. Another change is that page will redirect to the previous page.

Screen.Recording.2023-03-23.at.19.15.23.mov