[UX] Build list and build page with different margin

Using different margin for build list page and build causes issues when navigating back to repositories list. Unless clicking on the right end of “Builds” list in build page user has to aim again to click “Repositories” link on Builds list page.

In addition it’s wotrh to add direct link back to repositories list in breadcrumbs i.e:
Repositories > Builds > #70