minor bug fix in ColumnEdit2.js : phenotype selection with multiple clinicalMatrix datasets crash
minor bug fix in ColumnEdit2.js : phenotype selection with multiple clinicalMatrix datasets crash

acthp/ucsc-xena-client,acthp/ucsc-xena-client,ucscXena/ucsc-xena-client,acthp/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client,ucscXena/ucsc-xena-client