Reworked Contacts, Commodity and Trade boards

[jaghaimo]

New features:

• [ ] Rework Commodity board into one panel with two clickable Buy and Sell tables. Upon click show interaction plugin to decide behaviour (lay course, add as intel, cancel).
• [ ] Replace Profit tab in Commodity Board with a full-fledged Trade board. Show best trade routes under given configuration. Configurable (show interaction plugin): select minimum quantity, minimum profit, max distance, systems (one for just in-system trade options, or multiple/all for sector-wide trades).

Improvements:

• [ ] Refresh Contacts board functionality.
• [ ] Better support for custom contacts (add Other mission types).

Bugfixes:

• Do not add undiscovered abandoned stations to Storage intel. Will be added once discovered.