make the help dialog come up when users press "?", and go away if they press any key
make the help dialog come up when users press "?", and go away if they press any key

erasche/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,limeng12/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,SuLab/jbrowse,SuLab/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,Arabidopsis-Information-Portal/jbrowse,nathandunn/jbrowse,erasche/jbrowse,GreggHelt2/apollo-test,GreggHelt2/apollo-test,igemsoftware/Shenzhen_BGIC_0101_2013,limeng12/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,erasche/jbrowse,SuLab/jbrowse,GMOD/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,GMOD/jbrowse,limeng12/jbrowse,Arabidopsis-Information-Portal/jbrowse,limeng12/jbrowse,GMOD/jbrowse,erasche/jbrowse,nathandunn/jbrowse,Arabidopsis-Information-Portal/jbrowse,Arabidopsis-Information-Portal/jbrowse,nathandunn/jbrowse,erasche/jbrowse,limeng12/jbrowse,GMOD/jbrowse,GreggHelt2/apollo-test,Arabidopsis-Information-Portal/jbrowse,GMOD/jbrowse,limeng12/jbrowse,Arabidopsis-Information-Portal/jbrowse,limeng12/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,nathandunn/jbrowse,SuLab/jbrowse,GreggHelt2/apollo-test,GreggHelt2/apollo-test,SuLab/jbrowse,nathandunn/jbrowse,limeng12/jbrowse,SuLab/jbrowse,erasche/jbrowse,GreggHelt2/apollo-test,SuLab/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,igemsoftware/Shenzhen_BGIC_0101_2013,GreggHelt2/apollo-test,erasche/jbrowse