Restyle the carrer tab to better match the rest of our design

[henrikhorluck]

The career tab currently uses a shade of light blue that is used nowhere else on the site, and looks almost identical to the one we have on OW4. It would probably be a good idea to restyle it in some way to match the rest of the site, like with the .searchInput-class from profile-search, I would also like to remind that we have the .owCard() class that can easily added by importing it with @import '~common/less/constants.less'; (Or using the Pane-component)