Control: fixed -1 4.0.5.0

Now that the aforementioned changes have been made to both x2goclient.git and to VcXsrv (X2Go/Arctica Builds), the fix will be included in the next release of x2goclient.

Due to the potential for regressions from this fix, as well as the disruptive nature of the fix for #696, the next release of x2goclient will be 4.0.5.0 instead of 4.0.4.1.