Show claimed builds with a checkerboard background rather than a border, to increase visibility from a distance and remove positioning issues associated with the claim border with some fonts on some browsers
Move theme configuration to CSS, change building to transparent animated overlay to look more like a standard progress bar
Re-instate linear gradient, since it appears to be intended to be there. Removed intermediate middle line, since that makes the text harder to read
Move .claimed so that it is still effective and includes the same gradients as all other jobs. Set the progress bar interval to match default paint interval to avoid redraw issues
Merge pull request #29 from howama/master

JENKINS-20551 - Display improvements for claimed builds and progress views