Add styles for notices and error messages.
Style the dts on the help page to be bigger on larger screens
Override the help layout

We don't use the grid here, unlike base Alaveteli, so don't need to
mixin grid row.
Style popups as notices
Style links in correspondence and link box
Style describe state form
Fixes for older versions of IE

Reposition mysociety image for older IE - older IE has no support for background-size

Remove button padding in IE 7 only, position search icon, add color fallback.
Styling for attachment header.
Adding new icons for statuses