Fix alignment of buttons for #680
Fix alignment of buttons for #680

nathandunn/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,GMOD/jbrowse,GMOD/jbrowse,nathandunn/jbrowse,GMOD/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,GMOD/jbrowse,Arabidopsis-Information-Portal/jbrowse,GMOD/jbrowse,nathandunn/jbrowse,erasche/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,Arabidopsis-Information-Portal/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,erasche/jbrowse,nathandunn/jbrowse,erasche/jbrowse,nathandunn/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse