🧹 Clean up a couple blacklight views

This commit will account for the new versions of Blacklight and
Blacklight Gallery.  The masonry view no longer exists so we can't tell
how it's broken as of right now.  I'm sure we'll run into it during our
testing.

NOTE:  These changes refer to the shared search tenant.

app/views/catalog/_index_header_default.html.erb → app/views/catalog/_index_header.html.erb

@@ -1,9 +1,9 @@
-<%# OVERRIDE blacklight-gallery v0.12.0: 
-    TODO: commented out because bookmarks fail for shared search tenant. 
+<%# OVERRIDE Blacklight v7.35.0:
+    TODO: commented out because bookmarks fail for shared search tenant.
         If a bookmark is saved in shared tenant, it errors on subsequent views. %>
 
 <%# header bar for doc items in index view -%>
-<div class="documentHeader row">
+<header class="documentHeader row">
   <%# main title container for doc partial view
       How many bootstrap columns need to be reserved
       for bookmarks control depends on size.
@@ -12,13 +12,15 @@
     <% # bookmark functions for items/docs -%>
     <%#= render_index_doc_actions document, wrapping_class: "index-document-functions col-sm-3 col-lg-2" %>
   <% end %>
+
   <h3 class="index_title document-title-heading <%= document_actions.present? ? "col-sm-9 col-lg-10" : "col-md-12" %>">
     <% if counter = document_counter_with_offset(document_counter) %>
       <span class="document-counter">
         <%= t('blacklight.search.documents.counter', counter: counter) %>
       </span>
     <% end %>
-    <%= link_to_document document, document_show_link_field(document), counter: counter %>
+    <%= link_to_document document, counter: counter %>
   </h3>
+
   <%= document_actions %>
-</div>
+</header>