Another Opera orientated update.
Mainly its to address the issue brought up by teoo about the homepage links for extensions installed from the Chrome Web Store by the "Download Chrome Extension" (I suppose). Added code to allow SEM to differentiate those extensions and provide a link to the Chrome Web Store page instead of a 404 page at Opera's.
Also theres some minor layout changes to accommodate the addition of the sidebar. Code level, visually theres no change. Ok looks like theres a font change. Maybe I'll change it back in the next build.
Would like to thank Opera moderator dmichnowicz for the help. Really adds that human touch to the submission process. Learnt that sometimes you have to check the packed NEX file too even though the unpacked version works.