added selection  all none invert filter
added selection  all none invert filter

cnr-isti-vclab/meshlabjs,cignoni/meshlabjs,cnr-isti-vclab/meshlabjs,cignoni/meshlabjs,cignoni/meshlabjs,cnr-isti-vclab/meshlabjs,cnr-isti-vclab/meshlabjs,cignoni/meshlabjs,cignoni/meshlabjs,cnr-isti-vclab/meshlabjs