move street view cover button to the map as circleControl

public/static/css/map_editor.css

@@ -55,6 +55,12 @@
     visibility: hidden;
 }
 
+#overlayControl {
+    bottom: 20px;
+    right: 10px;
+    z-index: 3;
+}
+
 #deleteButton {
     display: none;
 }

public/static/js/map_editor.js

@@ -404,7 +404,7 @@
 
             LMapWrapper.loadMarkers(places);
 
-            document.getElementById('streetViewCoverSelector').disabled = true;
+            document.getElementById('streetViewCoverSelector').style.display = 'none';
         },
 
         hide: function () {
@@ -536,7 +536,7 @@
 
             GMapWrapper.loadMarkers(places);
 
-            document.getElementById('streetViewCoverSelector').disabled = false;
+            document.getElementById('streetViewCoverSelector').style.display = 'block'
         },
 
         hide: function () {