Fixed issuable sidebar label toggle not working

Removed un-used JS var

app/assets/javascripts/labels_select.js.coffee

@@ -26,7 +26,7 @@ class @LabelsSelect
       $colorPreview = $('.js-dropdown-label-color-preview')
       $newLabelCreateButton = $('.js-new-label-btn')
       fieldName = $dropdown.data('field-name')
-      useId = $dropdown.hasClass('js-issuable-form-dropdown') or $dropdown.hasClass('js-filter-bulk-update')
+      useId = $dropdown.is('.js-issuable-form-dropdown, .js-filter-bulk-update, .js-label-sidebar-dropdown')
       propertyName = if useId then "id" else "title"
       $newLabelError.hide()

app/assets/javascripts/users_select.js.coffee

@@ -142,7 +142,7 @@ class @UsersSelect
         selectable: true
         fieldName: $dropdown.data('field-name')
-        toggleLabel: (selected, el, e) ->
+        toggleLabel: (selected, el) ->
           if selected and 'id' of selected and $(el).hasClass('is-active')
             if selected.text then selected.text else selected.name
           else

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

@@ -127,9 +127,9 @@
           .selectbox.hide-collapsed
             - selected_labels = params["#{issuable.to_ability_name}[label_names]"].to_a
             - issuable.labels_array.each do |label|
-              = hidden_field_tag "#{issuable.to_ability_name}[label_names][]", label.id, id: nil, data: { title: label.title }
+              = hidden_field_tag "#{issuable.to_ability_name}[label_names][]", label.id, id: nil
             .dropdown
-              %button.dropdown-menu-toggle.js-label-select.js-multiselect{type: "button", data: {toggle: "dropdown", default_label: "Labels", field_name: "#{issuable.to_ability_name}[label_names][]", ability_name: issuable.to_ability_name, show_no: "true", show_any: "true", project_id: (@project.id if @project), issue_update: issuable_json_path(issuable), labels: (namespace_project_labels_path(@project.namespace, @project, :json) if @project)}}
+              %button.dropdown-menu-toggle.js-label-select.js-multiselect.js-label-sidebar-dropdown{type: "button", data: {toggle: "dropdown", default_label: "Labels", field_name: "#{issuable.to_ability_name}[label_names][]", ability_name: issuable.to_ability_name, show_no: "true", show_any: "true", project_id: (@project.id if @project), issue_update: issuable_json_path(issuable), labels: (namespace_project_labels_path(@project.namespace, @project, :json) if @project)}}
                 %span.dropdown-toggle-text{ class: ("is-default" if issuable.labels_array.empty?)}
                   = multi_label_name(issuable.labels_array, h(selected_labels[0]), "Labels")
                 = icon('chevron-down')