Fix for find dialog in the relax controller window.
This is for bug #22816 (https://gna.org/bugs/?22816), the find functionality of the relax controller
window does not find text when using wxPython >= 2.9.
The find wxPython events are now bound to the find dialog rather than the relax controller window
LogCtrl element for displaying the relax messages. This works on all wxPython versions.
