🐛 Fix list collection thumbnail alt text

This commit will fix the alt text for the collection thumbnail on the
dashboard and the Allinson Flex update will fix the thumbnail for the
work on the dashboard.

Ref:
  - samvera-labs/allinson_flex#121
  - #471

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/samvera-labs/allinson_flex.git
-  revision: 2141b481e2f4a35b4df87c54edf6bc7c1611bfb0
+  revision: 72e2cbeda64ea68769067ebb94ff1766101a94c3
   specs:
     allinson_flex (0.1.0)
       json_schemer

app/views/hyrax/dashboard/collections/_list_collections.html.erb

@@ -22,7 +22,7 @@
         <% if (collection_presenter.thumbnail_path == nil) %>
           <span class="<%= Hyrax::ModelIcon.css_class_for(::Collection) %> collection-icon-small"></span>
         <% else %>
-          <%= image_tag(collection_presenter.thumbnail_path, alt: "#{collection_presenter.title_or_label} #{t('hyrax.dashboard.my.sr.thumbnail')}") %>
+          <%= image_tag(collection_presenter.thumbnail_path, alt: block_for(name: 'default_collection_image_text') || "#{collection_presenter.title_or_label} #{t('hyrax.dashboard.my.sr.thumbnail')}") %>
         <% end %>
       </div>
       <%= link_to collection_presenter.show_path do %>

app/views/hyrax/my/collections/_list_collections.html.erb

@@ -24,7 +24,7 @@
         <% if (collection_presenter.thumbnail_path == nil) %>
           <span class="<%= Hyrax::ModelIcon.css_class_for(::Collection) %> collection-icon-small"></span>
         <% else %>
-          <%= image_tag(collection_presenter.thumbnail_path, alt: "#{collection_presenter.title_or_label} #{t('hyrax.dashboard.my.sr.thumbnail')}") %>
+          <%= image_tag(collection_presenter.thumbnail_path, alt: block_for(name: 'default_collection_image_text') || "#{collection_presenter.title_or_label} #{t('hyrax.dashboard.my.sr.thumbnail')}") %>
         <% end %>
       </div>
       <%= link_to collection_presenter.show_path, id: "src_copy_link#{id}" do %>