change geolocation icon

src/assets/styles/openlayers-custom.css

@@ -165,7 +165,7 @@ button.button-geolocation.tracking {
 button.button-geolocation i {
   margin: 0;
   vertical-align: top; /* strangely top is the only value that center at middle */
-  background-image: url(../img/geolocation-icon.png); /* 16px x 16px */
+  background-image: url(../img/geolocation-icon.png);
   background-size: cover;
   width: 25px;
   height: 25px;