Fix scss lint warnings

app/assets/stylesheets/admin.scss

@@ -972,41 +972,47 @@ table {
 // 09. Map
 // --------------
 
-.map{
+.map {
   width: 100%;
   height: 350px;
+
   .map-marker {
     visibility: visible;
     position: absolute;
     left: 50%;
     top: 50%;
     margin-top: -5px;
-    .map-icon{
+
+    .map-icon {
       width: 30px;
       height: 30px;
       border-radius: 50% 50% 50% 0;
       background: #00cae9;
       transform: rotate(-45deg);
     }
-    .map-icon:after {
-      content: "";
+
+    .map-icon::after {
+      content: '';
       width: 14px;
       height: 14px;
       margin: 8px 0 0 8px;
-      background: white;
+      background: #fff;
       position: absolute;
       border-radius: 50%;
     }
   }
-  .map-attributtion{
+
+  .map-attributtion {
     visibility: visible;
     height: auto;
   }
 }
-.map-marker{
+
+.map-marker {
   visibility: hidden;
 }
-.map-attributtion{
+
+.map-attributtion {
   visibility: hidden;
   height: 0;
-}
+}