Improve icons and style for manual build status

## What does this MR do?

This MR changes the CSS class for manual build status badge to make it a little more different than skipped build status badge. It makes it darker.

## Screenshots

![Screen_Shot_2016-12-17_at_13.37.58](/uploads/9628f0e84fdaad82d8833f546f0192a6/Screen_Shot_2016-12-17_at_13.37.58.png)![Screen_Shot_2016-12-17_at_13.31.48](/uploads/fe8e27df0274b9f9ae840110593a298a/Screen_Shot_2016-12-17_at_13.31.48.png)


See merge request !8102