Add repository name on Page Title (BB-10829)

On every single page of Bitbucket, there isn't a single element or text that defines the current repo.

The only way to know the current repo is reading the URL on browser.
And if a user has several repos and don't have URL visible on browser, it can be nasty.

My proposal is to append the Repo Name along the Page Title, for example:

"MyRepo Issues"

"MySecondRepo Source"

and so on...