cache cleanup script

Change-Id: I6a1ff5f0f62cbb44563528f432b2924150bc169c
(bug 44154) Blank feedback is confusing

* Display message when no comment was submitted
* Use "more"-link to toggle to full text

Change-Id: I8219d942a79fbb54082a06a488fd384fd6cadde5
Merge "cache cleanup script"