[q3map2] import fixes from Thomas Köppe
These are some fixes from GtkRadiant source tree applied in August 2016. Thanks to Thomas Köppe tkoeppe@google.com.
Se here: https://github.com/TTimo/GtkRadiant/pulls?utf8=%E2%9C%93&q=is%3Apr%20is%3Aclosed%20author%3Atkoeppe For dedicated thread for each commit.
Edited by Thomas Debesse