Merge branch 'backport-ee-helper-changes' into 'master'

Backport some EE helper changes

See merge request gitlab-org/gitlab-ce!23631

app/helpers/dropdowns_helper.rb

@@ -11,6 +11,10 @@ module DropdownsHelper
 
       dropdown_output = dropdown_toggle(toggle_text, data_attr, options)
 
+      if options.key?(:toggle_link)
+        dropdown_output = dropdown_toggle_link(toggle_text, data_attr, options)
+      end
+
       dropdown_output << content_tag(:div, class: "dropdown-menu dropdown-select #{options[:dropdown_class] if options.key?(:dropdown_class)}") do
         output = []
 
@@ -49,6 +53,11 @@ module DropdownsHelper
     end
   end
 
+  def dropdown_toggle_link(toggle_text, data_attr, options = {})
+    output = content_tag(:a, toggle_text, class: "dropdown-toggle-text #{options[:toggle_class] if options.key?(:toggle_class)}", id: (options[:id] if options.key?(:id)), data: data_attr)
+    output.html_safe
+  end
+
   def dropdown_title(title, options: {})
     content_tag :div, class: "dropdown-title" do
       title_output = []

app/helpers/selects_helper.rb

@@ -29,6 +29,11 @@ module SelectsHelper
     classes = Array.wrap(opts[:class])
     classes << 'ajax-groups-select'
 
+    # EE requires this line to be present, but there is no easy way of injecting
+    # this into EE without causing merge conflicts. Given this line is very
+    # simple and not really EE specific on its own, we just include it in CE.
+    classes << 'multiselect' if opts[:multiple]
+
     opts[:class] = classes.join(' ')
 
     select2_tag(id, opts)