Fixed width of sub-group in breadcrumb dropdown

Closes #37745

app/helpers/groups_helper.rb

@@ -21,7 +21,7 @@ module GroupsHelper
 
     group.ancestors.reverse.each_with_index do |parent, index|
       if index > 0
-        add_to_breadcrumb_dropdown(group_title_link(parent, hidable: false, show_avatar: true), location: :before)
+        add_to_breadcrumb_dropdown(group_title_link(parent, hidable: false, show_avatar: true, for_dropdown: true), location: :before)
       else
         full_title += breadcrumb_list_item group_title_link(parent, hidable: false)
       end
@@ -85,8 +85,8 @@ module GroupsHelper
 
   private
 
-  def group_title_link(group, hidable: false, show_avatar: false)
-    link_to(group_path(group), class: "group-path breadcrumb-item-text js-breadcrumb-item-text #{'hidable' if hidable}") do
+  def group_title_link(group, hidable: false, show_avatar: false, for_dropdown: false)
+    link_to(group_path(group), class: "group-path #{'breadcrumb-item-text' unless for_dropdown} js-breadcrumb-item-text #{'hidable' if hidable}") do
       output =
         if (group.try(:avatar_url) || show_avatar) && !Rails.env.test?
           image_tag(group_icon(group), class: "avatar-tile", width: 15, height: 15)