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.

[jaghaimo]

@Evolter this branch name is a bit misleading, it was supposed to be 3.2.0 release which I never finished. I'll restore the branch, maybe someone, someday will get to work on it (or maybe I'll find time).

[Evolter]

I took the liberty of changing this PR to a draft for now (needs rebasing and finishing off).