added check to ensure we do not fail if PyQt5 is not in sys.modules
Merge pull request #290 from ablasdel/groovy-devel

added check to ensure we do not fail if PyQt5 is not in sys.modules
Merge remote-tracking branch 'upstream/groovy-devel' into groovy-devel

* upstream/groovy-devel:
  added check to ensure we do not fail if PyQt5 is not in sys.modules