No longer allow to deselect use of the BEAGLE library but keep text on the dialog to show users that BEAGLE is required.
No longer allow to deselect use of the BEAGLE library but keep text on the dialog to show users that BEAGLE is required.

adamallo/beast-mcmc,4ment/beast-mcmc,adamallo/beast-mcmc,maxbiostat/beast-mcmc,maxbiostat/beast-mcmc,4ment/beast-mcmc,4ment/beast-mcmc,beast-dev/beast-mcmc,4ment/beast-mcmc,maxbiostat/beast-mcmc,adamallo/beast-mcmc,beast-dev/beast-mcmc,beast-dev/beast-mcmc,maxbiostat/beast-mcmc,adamallo/beast-mcmc,maxbiostat/beast-mcmc,maxbiostat/beast-mcmc,4ment/beast-mcmc,beast-dev/beast-mcmc,4ment/beast-mcmc,beast-dev/beast-mcmc,adamallo/beast-mcmc,adamallo/beast-mcmc,beast-dev/beast-mcmc