Revert "Removed Move button. Unit movement occurs when user clicks on a valid moveable n…"

This reverts commit afb15ea3

See merge request !8

This reverts commit afb15ea3

Removed Move button. Unit movement occurs when user clicks on a valid moveable node after selecting a unit

Added enemy information popup upon selection. Added Player1 and Player2 to GameState and removed boolean field indicating if there is a selected unit.

Fixed right clicking outside of attack range when in attack select. Modified hit damage popup visuals