[Dashboard] Add "company profile" card

[hampfh]

Right now there is a card "additional information", available in final registration where the company can set their data such as logo, description, who they are looking for etc...

This should be a static card that is always visible in the dashboard

[didrikmunther]

This information exists on the exhibitor model, which is only created after a company has been accepted to the fair. A couple of solutions exists:

• We move the fields to the company model. Pro: easy. Con: we lose year-specific information for the company.
• We copy the fields to the company model. Pro: easy. Con: not elegant.
• We create an exhibitor immediately when a company signs IR, but with a status field (accepted, rejected, reserve). Pro: also solves #1181. Con: more complicated