Fix CSS errors

Fixed 1 missing semicolon and two occurences of `--webkit-transition` (note the double hyphen).

Currently making first babysteps into af 2.0, converting my apps from jqmobi 1.1... This is like the 1st thing that came up red in my IDE - wonder if we have any code quality tools at hand that could check for such violations as part of the build process and/or test suite.