Remove 'Click to edit Menu' section in base-top-menu.ftl

The differences in menu templates are found if you create a project using archetype and also use essentials to add the menu component:

• If you added 'menu' container item component in template composer, the text (the #else block in essentials-menu.ftl) is meaningful because the component editing window somehow provides ability to add a new menu.
• However, if you're editing a non-container item component like the top menu, then the text (the #else block in base-top-menu.ftl added by archetype) doesn't seem meaningful any more because there's nothing to help user with creating a new menu.

Maybe the #else section in the base-top-menu.ftl can be changed like the following:

<#else>
  <#if editMode>
    <p>Invalid menu configuration.</p>
  </#if>
</#if>

Or,

just remove the #else part, because the person who gets to see it is not the person who would typically be able to do anything about it...