fix code smells

src/components/subtitleuploader/subtitleuploader.template.html

@@ -1,5 +1,5 @@
 <div class="formDialogHeader">
-    <button is="paper-icon-button-light" class="btnCancel autoSize" tabindex="-1"><i class="material-icons arrow_back"></i></button>
+    <button is="paper-icon-button-light" class="btnCancel autoSize" tabindex="-1"><em class="material-icons arrow_back"></em></button>
     <h3 class="formDialogHeaderTitle">
         ${HeaderUploadSubtitle}
     </h3>
@@ -14,7 +14,7 @@
                 <h2 style="margin:0;">${HeaderAddUpdateSubtitle}</h2>
 
                 <button is="emby-button" type="button" class="raised raised-mini btnBrowse" style="margin-left:1.5em;">
-                    <i class="material-icons">folder</i>
+                    <em class="material-icons">folder</em>
                     <span>${Browse}</span>
                 </button>
             </div>