for CSS styling, let's lose the fixed height; localized strings could cause this to spill over into 2 lines, and having a fixed height in the bottom info-bar thing was a bug we had to fix (Bug 873762).  Accordingly, we also need to have padding on all 4 sides.  I'd say let's just go with what's in .msg-reader-load-infobar, so a font-size of 1.2rem.  And we need to change the (-moz-)box-sizing for the line wrapping, etc. too.