Fix elevation view styles

public/assets/images/scenario_template.svg

@@ -1,5 +1,6 @@
 <?xml version="1.0" standalone="no"?>
-<svg viewBox="-10 -10 200 300" xmlns="http://www.w3.org/2000/svg">
+<svg viewBox="-10 -10 200 300"
+  xmlns="http://www.w3.org/2000/svg">
   <link xmlns="http://www.w3.org/1999/xhtml" rel="stylesheet" href="../css/map.css" type="text/css" />
   <link xmlns="http://www.w3.org/1999/xhtml" rel="stylesheet" href="../css/radial.css" type="text/css" />
   <style>
@@ -46,7 +47,7 @@
     <image id="counter-grenade" href="counter_grenade.jpg" width="10"/>
   </defs>
 
-  <g class="gameboard" data-view-elevation="0">
+  <g class="gameboard">
     <rect id="background"/>
 
     <rect id="dots" fill="url(#asterisk)"/>
@@ -56,6 +57,6 @@
       <g id="lines"/>
     </g>
 
-    <g class="grid"/>
+    <g class="grid" data-view-elevation="0"/>
   </g>
 </svg>