Breakdown CSS: split styling for table inline edits

Removed the nonexistent halflings image reference.  Some inline editing
functionalities are broken after bootstrap patch (not because of this
change!). These issues will be address with another patch.

Change-Id: If349c6e4bd8afeded061a21561ea911bcb472abe
Closes-Bug: #1379519
Partially-Implements: blueprint css-breakdown
Fixes nothing is displayed if volume metadata is empty problem

If volume metadata is empty, nothing is displayed below "Metadata"
<h4> heading in the volume detail page. So, this patch fixes this
problem by displaying "None".

Change-Id: I0302e47cc8c9e471972ef7c249d54582242b5390
Closes-bug: #1382876
Merge "Fixes nothing is displayed if volume metadata is empty problem"
Merge "Breakdown CSS: split styling for table inline edits"