Add project name to issue pages’ head title

My only concerns are:

A) It's a pain to have the page title for the purposes of the <title> tag different from the displayed title in the <h1> in the body itself. So, that'd mean that the big text at the top of this page would also read:

"change page title for issue | Project issue tracking"

Which is redundant info with the "Project: Project issue tracking" in the table right below, and the breadcrumb right above.

B) Some projects have stupidly long titles. That complicates (A). It's not that bad for usability/layout to have a really long <title> tag, but that opening <h1> makes it more complicated to have a huge string.

If there are sane answers to these concerns, it'd be a relatively trivial patch.

I think dww's concerns are valid. I know that on my site running project* there are several projects with *really* long titles, and that would make both the page title and h1 really long. I'm not sure it's worth doing, especially since searching for issues has improved quite a bit with the D6 version of project_issue.

With metatag installed, this is a matter of changing the configuration (@damienmckenna pointed this out on slack in #general)

Yes, this is a site-specific request. For example, a site with one project might not want this.

If this change is done, we can go back and remove project_issue_preprocess_html.

See also #2875869: Usability improvement request: Add status to title tag in issue nodes. We need to decide what’s most useful to have in the title, without letting it get too long (or maybe it is okay being really long).