Version 0.21.0

Fixes:

• Human with PC in charge of AI players seeing AI vs Human battle that should be hidden
• Crashes with linux build while spectating/waiting on turn

Version 0.20.0

Fixed issue with AI heroes vanishing from game when attacking fellow AI heroes (or neutrals?)

Version 0.19.2

Re-enabled paste from clipboard into dialog (e.g. url address) using Ctrl-v or middle mouse button.