Improve a few translations for webconf rooms
Review typography, rebuilding typography.css entirely

Normal font is now slightly bigger (13px) and header sizes more consistent.
Made lots of small changes in other views and stylesheets to adapt to this
new "font style".

Cherry-pick 282c195
Conflicts:
	app/assets/stylesheets/_definitions.css.scss
Adjust the color of the links in #page-menu