Add missing icons for all WayPoint types specified by CUP format.
Add the icons made my Massimo Belloni
Revert "Add LKASSERT and prevent division by zero in LKAirspace"

This reverts commit 8ca00466aa37ef598b94315f3af5e30345513dfc.
missed const specifier in draw airspace picto
fix wrong int to double cast in draw airspace picto
check possible division by zero inside draw airspaces picto.
Merge branch 'AddWPicons' of https://github.com/alus-/LK8000 into icons