Fix a bug in clip tool where an exception was thrown when the first point is set and the camera looks down in a 45 deg. angle.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Fix Windows build for wxWidgets 2.9.5
Make selection of clip side deterministic
Keep clip side after clip tool is deactivated

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Fix problems with keyboard shortcuts not being saved properly.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>