EVOLUTION-MANAGER

Edit File: optgroup_columns.less

.selectize-dropdown.plugin-optgroup_columns { .optgroup { border-right: 1px solid #f2f2f2; border-top: 0 none; float: left; .selectize-box-sizing(border-box); } .optgroup:last-child { border-right: 0 none; } .optgroup:before { display: none; } .optgroup-header { border-top: 0 none; } }