MAPG-229 make .controlItem relative so it's children can be sized more properly

public/static/css/mapguesser.css

@@ -451,6 +451,7 @@ div.box {
 }
 
 .circleControl .controlItem {
+    position: relative;
     height: 60px;
     margin-top: 10px;
     opacity: 70%;
@@ -463,6 +464,8 @@ div.box {
 
 .circleControl .controlItem div {
     position: absolute;
+    width: 100%;
+    height: 100%;
 }
 
 .circleControl .controlBackground {
@@ -477,7 +480,6 @@ div.box {
     margin: auto;
     margin-top: 50%;
     transform: translateY(-50%);
-    -ms-transform: translateY(-50%);
 }
 
 @media screen and (max-width: 599px) {