Cancel Branch Protection form doesn't cancel

[maospr]

Description

Simplest way to reproduce is to add a new protection rule, enter a branch name pattern & scroll down to click 'Cancel'.
The result is a new rule with that name, I expected that no rule would be added.

The same goes for editing existing rules and clicking 'Cancel', it always tries to persist the changes instead of actually cancelling.

I've reproduced this on the Gitea demo site:
https://try.gitea.io/tester-bob/branch_prot_test/settings/branches

But the same issue is also present on version 1.19.2.

Gitea Version

1.20.0+dev-973-g5d23c885e

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

Before:

Add new rule:

&Cancel:

After:

Git Version

2.40.1

Operating System

FreeBSD 13.2

How are you running Gitea?

Gitea is running within a FreeBSD jail and installed through the FreeBSD package manager.

Database

PostgreSQL

[wxiaoguang]

The "Cancel" button was added by #20825 , but it is also a "submit" button, so it needs to be changed to a <a> with link.