New Ticket page on Core Trac scrolls user past notices box

[RMarks]

When you browse to ​Core's New Ticket screen, the page is automatically scrolled down a bit which hides the notices that Trac isn't for support or security vulnerabilities.

[dd32]

This is being caused by $(".trac-autofocus").focus(); which focuses the title field, which if it's below the fold, will scroll the page to it.

It looks like that JS comes directly from Trac, and isn't present in our templates.

We could probably use a <py:match path="...." py:strip="" /> or something to strip the trac-autofocus class out of the HTML..
(I'm going to have leave this for someone with more Trac customisation experience unfortunately)

[dd32]

In 8052:

Trac: Disable the Trac Autofocus feature which scrolls past the new ticket intro which discusses security reporting, etc.

Fixes #4018.

[dd32]

In 8053:

Trac: Bump cache busters following r8052.

Fixes #4018.