Fixed labels & milestones loading the wrong path

app/helpers/dropdowns_helper.rb

@@ -40,7 +40,11 @@ module DropdownsHelper
   end
 
   def dropdown_toggle(toggle_text, data_attr, options = {})
-    default_label = options[:data][:default_label]
+    default_label = if options[:data]
+                      options[:data][:default_label]
+                    else
+                      ''
+                    end
     content_tag(:button, class: "dropdown-menu-toggle #{options[:toggle_class] if options.has_key?(:toggle_class)}", id: (options[:id] if options.has_key?(:id)), type: "button", data: data_attr) do
       output = content_tag(:span, toggle_text, class: "dropdown-toggle-text #{'is-default' if toggle_text == default_label}")
       output << icon('chevron-down')

app/helpers/labels_helper.rb

@@ -115,8 +115,9 @@ module LabelsHelper
   end
 
   def labels_filter_path
+    project = @target_project || @project
     if @project
-      namespace_project_labels_path(@project.namespace, @project, :json)
+      namespace_project_labels_path(project.namespace, project, :json)
     else
       dashboard_labels_path(:json)
     end

app/helpers/milestones_helper.rb

@@ -47,8 +47,9 @@ module MilestonesHelper
   end
 
   def milestones_filter_dropdown_path
+    project = @target_project || @project
     if @project
-      namespace_project_milestones_path(@project.namespace, @project, :json)
+      namespace_project_milestones_path(project.namespace, project, :json)
     else
       dashboard_milestones_path(:json)
     end

app/views/shared/issuable/_label_dropdown.html.haml

@@ -14,7 +14,7 @@
 
 - if selected.present?
   - if selected.respond_to?('any?')
-    - selected = project.labels.find_by_id(selected) || selected
+    - selected = project.labels.where(id: selected) || selected
     - selected.each do |label|
       - id = label.try(:id) || label
       - title = label.try(:title) || label