Fix labels page missing margins and oversized fonts

app/assets/stylesheets/pages/labels.scss

@@ -196,6 +196,10 @@
 .prioritized-labels {
   margin-bottom: 30px;
+  h5 {
+    font-size: $gl-font-size;
+  }
+
   .add-priority {
     display: none;
     color: $gray-light;
@@ -210,6 +214,10 @@
 }
 .other-labels {
+  h5 {
+    font-size: $gl-font-size;
+  }
+
   .remove-priority {
     display: none;
   }

app/views/projects/labels/index.html.haml

@@ -22,7 +22,7 @@
         -# Only show it in the first page
         - hide = @available_labels.empty? || (params[:page].present? && params[:page] != '1')
         .prioritized-labels{ class: ('hide' if hide) }
-          %h5 Prioritized Labels
+          %h5.prepend-top-10 Prioritized Labels
           %ul.content-list.manage-labels-list.js-prioritized-labels{ "data-url" => set_priorities_project_labels_path(@project) }
             #js-priority-labels-empty-state{ class: "#{'hidden' unless @prioritized_labels.empty?}" }
               = render 'shared/empty_states/priority_labels'