Use JS for damage indicator changes instead of CSS

public/index.html

@@ -13,18 +13,6 @@
         <slot name="firing-modifier"></slot><br>
         <slot name="movement-points"></slot>
       </span>
-      <label>
-        <input type="radio" name="damage" checked>
-        <span class="damage-selector lethal"></span>
-      </label>
-      <label>
-        <input type="radio" name="damage">
-        <span class="damage-selector clear"></span>
-      </label>
-      <label>
-        <input type="radio" name="damage">
-        <span class="damage-selector bruise"></span>
-      </label>
     </template>
 
     <template id="soldier-record-block">