Fix problem with the latest LESS engine

front/src/css/rule.css

@@ -134,6 +134,7 @@
 }
 .offenders .offenderButton.opens:hover > div {
   display: block;
+  background: #ffe0cc;
 }
 .offendersHtml {
   display: inline-block;
@@ -183,7 +184,6 @@
 .colorPalette > div:hover:after {
   content: " ";
   position: absolute;
-  background-color: inherit;
   left: -0.2em;
   top: -0.2em;
   width: 100%;

front/src/less/rule.less

@@ -149,6 +149,7 @@
 
             > div {
                 display: block;
+                background: #ffe0cc;
             }
         }
     }
@@ -208,7 +209,6 @@
         &:hover:after {
             content: " ";
             position: absolute;
-            background-color: inherit;
             left: -0.2em;
             top: -0.2em;
             width: 100%;