[Toaster] [review-request] 7191 Version2 format shaid on all layers page

[Lerner, Dave]

http://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/log/?h=lerner/layers_commitfield_7191

7191 - If field looks like a commit SHAID(hex and 40 digits), truncate field as button label, and show full SHAID when button depressed.

Dave Lerner