preview buttons (and dropdowns generally) improve a little
ensuring classes are consistent
Merge remote-tracking branch 'upstream/feature/pagemodes' into feature/pagemodes
use url_info.hostname rather than url_info.netloc when building dummy request headers - netloc includes port number for non-standard ports, which we don't want
updated drop-ups for new preview button. improved icon rendering on windows generally.
Merge branch 'feature/pagemodes'