Fixed the positioning of the label dropdown in the issuable form

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

@@ -61,7 +61,7 @@
         = form.hidden_field :label_ids, multiple: true, value: ''
         .col-sm-10{ class: "#{"col-lg-8" if has_due_date} #{'issuable-form-padding-top' if !has_labels}" }
           .issuable-form-select-holder
-            = render "shared/issuable/label_dropdown", classes: ["js-issuable-form-dropdown"], selected: issuable.labels, data_options: { field_name: "#{issuable.class.model_name.param_key}[label_ids][]", show_any: false, show_menu_above: 'true' }, dropdown_title: "Select label"
+            = render "shared/issuable/label_dropdown", classes: ["js-issuable-form-dropdown"], selected: issuable.labels, data_options: { field_name: "#{issuable.class.model_name.param_key}[label_ids][]", show_any: false }, dropdown_title: "Select label"
 
       - if issuable.respond_to?(:weight)
         - weight_options = Issue.weight_options