[More robust mana symbols] 0 mana and 10mana cards don't work properly

[marshmellion]

If you have the ai generate a 10 mana card for some reason it will show 1 mana, if you hit the silver edit button it clearly intends to make a 10 mana card but the 0 is not in brackets and for some reason 0 mana doesn't show up either. 0 mana should show as its different from being manaless.

[forrestcoward]

Colorless 10 mana spells should now render correctly but I need to rework some of the code to make the symbols more robust in general.