fix: template editor help button

addon/chrome/content/templateEditor.xhtml

@@ -108,11 +108,11 @@
               ></xul:menuitem>
             </xul:menupopup>
           </xul:menulist>
-          <button
+          <xul:button
             id="templateType-help"
             data-l10n-id="templateType-help"
             class="help-button"
-          ></button>
+          ></xul:button>
         </xul:hbox>
         <xul:hbox align="center">
           <div style="flex-shrink: 0" data-l10n-id="templateName"></div>

addon/locale/en-US/templateEditor.ftl

@@ -11,7 +11,7 @@ templateType-system =
 templateType-unknown =
     .label = ?
 templateType-help =
-    .label = About...
+    .label = ?
     .title = Detailed explanation of template types
 
 templateName = Template Name

addon/locale/it-IT/templateEditor.ftl

@@ -11,7 +11,7 @@ templateType-system =
 templateType-unknown =
     .label = ?
 templateType-help =
-    .label = Informazioni su...
+    .label = ?
     .title = Spiegazioni dettagliate sui tipi di template
 
 templateName = Nome template

addon/locale/ru-RU/templateEditor.ftl

@@ -11,7 +11,7 @@ templateType-system =
 templateType-unknown =
     .label = ?
 templateType-help =
-    .label = About...
+    .label = ?
     .title = Detailed explanation of template types
 
 templateName = Имя шаблона

addon/locale/tr-TR/templateEditor.ftl

@@ -11,7 +11,7 @@ templateType-system =
 templateType-unknown =
     .label = ?
 templateType-help =
-    .label = About...
+    .label = ?
     .title = Detailed explanation of template types
 
 templateName = Şablon Adı

addon/locale/zh-CN/templateEditor.ftl

@@ -11,7 +11,7 @@ templateType-system =
 templateType-unknown =
     .label = ?
 templateType-help =
-    .label = 关于...
+    .label = ?
     .title = 模板{ -variable-type }的详细解释
 
 templateName = 模板名称