Set primary colors for group toggle

app/components/dropdown_component.rb

@@ -1,10 +1,11 @@
 # frozen_string_literal: true
 
+# Displays drop down for search controls. Overriding to use btn-outline-primary
 class DropdownComponent < Blacklight::System::DropdownComponent
   def before_render
     # this is overriding the default button classes set in Blacklight
     # (we want to use btn-outline-primary for EarthWorks instead of btn-outline-secondary)
-    with_button(label: button_label, classes: %w[btn btn-outline-primary dropdown-toggle])
+    with_button(label: button_label, classes: %w(btn btn-outline-primary dropdown-toggle))
     super
   end
 end

app/views/search_across/_group_toggle.html.erb

@@ -1,6 +1,6 @@
 <% unless @response.documents.blank? %>
   <div class="btn-group search-group" role="group" aria-label="Basic example">
-    <%= link_to 'All results', url_for(search_without_group), class: "btn btn-sm btn-secondary #{'active' unless params[:group]}" %>
-    <%= link_to 'Grouped by exhibit', url_for(search_with_group), class: "btn btn-sm btn-secondary #{'active' if params[:group]}" %>
+    <%= link_to 'All results', url_for(search_without_group), class: "btn btn-sm btn-primary #{'active' unless params[:group]}" %>
+    <%= link_to 'Grouped by exhibit', url_for(search_with_group), class: "btn btn-sm btn-primary #{'active' if params[:group]}" %>
   </div>
 <% end %>