Misc. CSS typo fixes; Firefox compatibility fixes

Add a standard "border-radius" property (supported since Firefox 4)
to deprecated "-moz-border-radius" (required for Firefox 3.x and
older, property not supported anymore since Firefox 13).

Change-Id: Ib73b7052c68507ff434764163b81624c1560ae3c
Merge "Misc. CSS typo fixes; Firefox compatibility fixes"