amend css to improve reliability of sortable index finding

Author: homerjam

Diff for: src/common.css

@@ -151,7 +151,11 @@ body > .ui-select-bootstrap.open {
   position: relative;
 }
 
-.ui-select-multiple .ui-select-match-item.dropping-before:before {
+.ui-select-multiple .ui-select-match-item.dropping .ui-select-match-close {
+  pointer-events: none;
+}
+
+.ui-select-multiple:hover .ui-select-match-item.dropping-before:before {
   content: "";
   position: absolute;
   top: 0;
@@ -161,7 +165,7 @@ body > .ui-select-bootstrap.open {
   border-left: 1px solid #428bca;
 }
 
-.ui-select-multiple .ui-select-match-item.dropping-after:after {
+.ui-select-multiple:hover .ui-select-match-item.dropping-after:after {
   content: "";
   position: absolute;
   top: 0;