feat: styles for the layer switcher button

Author: andreishket

vis/stylesheets/modules/_geomap.scss

@@ -43,6 +43,7 @@
   color: #818181;
 
   &:hover {
+    cursor: pointer;
     color: #333;
   }
 
@@ -59,3 +60,11 @@
 .leaflet-container * {
   font-family: "Open Sans", Helvetica, sans-serif;
 }
+
+.leaflet-control-layers {
+  box-shadow:
+    0 2px 2px 0 rgba(0, 0, 0, 0.14),
+    0 3px 1px -2px rgba(0, 0, 0, 0.12),
+    0 1px 5px 0 rgba(0, 0, 0, 0.2);
+  border: none;
+}