add .circle, delete circle-front and circle-back

src/client/styles/scss/_admin.scss

@@ -113,25 +113,12 @@
       border-style : dashed;
       border-width : 2px;
     }
-    .circle-front {
-      // position: relative;
-      width: 74px;
-      height: 74px;
-      margin: 0 auto;
-      background: #092c58;
-      border-radius: 50%;
-    }
-    .circle-back {
-      // position: absolute;
-      width: 100px;
-      height: 100px;
-      background: #d0d6de;
-      border-radius: 50%;
-    }
     .circle{
       width: 100px;
       height: 100px;
-      
+      background: #092c58;
+      border: 10px solid #d0d6de;
+      border-radius: 50%;
     }
   }