Make it clearer how to update a wordpress.org theme

[BinaryMoon]

When I submitted a theme to wordpress.org I had some revisions to make, and there were no clear options for updating the theme. Since I host some plugins on here my first instinct was to try to commit the theme to svn. That didn't work. So I attached the update to Trac. Using the upload page was not clear - since that page is geared toward submitting a new theme.

There are 2 parts to my suggestion for fixing this.

1) Make the upload page clearer. I would make the title clear that you can upload theme updates as well as submitting a theme. This will give new users a hint that they should both submit and update their themes on the same page. Something like: ​https://cloudup.com/cph2nUtqfVu

2) add a button to the bottom of the theme review trac (near where you enter replies to feedback) that says something like 'upload theme update' - and links through to the upload page mentioned above. ​https://cloudup.com/cJDpqzhck2q

I know point 2 is harder since it's modifying trac. I don't know how flexible trac is - but since there's a custom header and footer you could use javascript to inject the link.

[Kenshino]

I think at least a few lines should be added (​https://wordpress.org/themes/upload/) to cater to the 2 distinct personas -

• New Theme developers
• Returning Theme developers

[poena]

I see no reason to postpone this further. We can always change it again later.

[rabmalin]

Any blockers for this to be committed?

[coffee2code]

In 4054:

Theme Directory: Change header title for upload page to clarify that the form is also for theme update submissions.

Props BinaryMoon, rabmalin.
Fixes #1651.