Fixed a small issue, on Linux, which showed a blank window in place of the help window when this one was supposed to be hidden upon starting OpenCOR.
Fixed a small issue, on Linux, which showed a blank window in place of the help window when this one was supposed to be hidden upon starting OpenCOR.

mirams/opencor,mirams/opencor,Fairly/opencor,mirams/opencor,mirams/opencor,Fairly/opencor,Fairly/opencor,Fairly/opencor,mirams/opencor,Fairly/opencor