Update on the planet UI/state

I noticed a while ago that my calculation of the screens safe area was wrong.
Only the planet UI was affected by this as I had to draw everthing in a tiny space.
I have redone the UI to better fit the new dimensions and also added functionality.
It is now possible to buy and sell stuff if you have the money and/or items.

It is also possible to invest into the categories of the planet. Although this does not do very much at the moment except cost you money.
The invesment and the needed resources to level up is what I will be working on for the rest of the day.
Also I am going to at least define very loose what a planet is offering and buying in accordance to its levels.