Turn off background-click = close for popups

Harmful to memory and state.
Fix popup width to be equal to row width

Giving ugly white space otherwise.
Comments: fix save bug
Comments: improve language a bit
Add 'revert all' option to records editor
Fix various UI bugs, generally nicer look

Also fix missing recordsgrid-rowmeta.html.
Also disabled editing of comments on supposedly-readonly zones.
Also whatever.