Add margin in vertical scalar bar between title and bar.

Add a setting to fine tune the distance between the bar and the title.

Change-Id: I64cc824c70126a3854c501cc65335d6421835a75
Update baseline image.

Change-Id: Ie571d417ffdac4c44ead2fbb42080ac03cfc60e5
Merge topic 'scalar-bar-margin' into master

a2b1ba7b Update baseline image.
5a8c6139 Add margin in vertical scalar bar between title and bar.