Suggested 2v2 change: mobi-bombshell nerf

[connor34911]

In 2v2 you should not be able to mobi a SHELLED bombshell. It's one thing to mobi a 2 hp sniper, but a 4 hp BS is a different story. I think that only units that can move on their own should be able to be mobi'd. My suggested change would be to make it so that only UNSHELLED bombshells can be mobi'd. This would only affect 2v2 and I believe it would balance the matchups a little bit more.