MUServerRootViewController: fix wrong check for 'when not in messages view'; add segment index comments.
MUServerRootViewController: fix wrong check for 'when not in messages view'; add segment index comments.

mumble-voip/mumble-iphoneos,jinie/mumble-iphoneos,HiroshiTakayama/IP-Incom,HiroshiTakayama/IP-Incom,jinie/mumble-iphoneos,mumble-voip/mumble-iphoneos,jinie/mumble-iphoneos,mumble-voip/mumble-iphoneos,HiroshiTakayama/IP-Incom,HiroshiTakayama/IP-Incom