text editor creates squares on some systems. Based on info from
Martin, it appears the keymodifier is being set when it shouldn't.
I think this is happening become some systems may be generating
KM_PRESS events without a matching KM_RELEASE?
Also ignore ascii values 1-32 now instead of 14-32, not sure why
they were included now in 2.5 because they were not in 2.4, but
I don't see a reason to do it. This fixes squares when pressing
e.g. ctrl+b or ctrl+n.