Make few minor styling changes to project labels page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

@@ -15,20 +15,20 @@
     .top-area.adjust
       .nav-text
         = _('Labels can be applied to issues and merge requests.')
-        - if can_admin_label
-          %br
-          = _('Star a label to make it a priority label. Order the prioritized labels to change their relative priority, by dragging.')
       .nav-controls
         = form_tag project_labels_path(@project), method: :get do
           .input-group
             = search_field_tag :search, params[:search], { placeholder: _('Filter'), id: 'label-search', class: 'form-control search-text-input input-short', spellcheck: false }
             %span.input-group-append
-              %button.btn{ type: "submit", "aria-label" => "Submit search" }
+              %button.btn.btn-default{ type: "submit", "aria-label" => _('Submit search') }
                 = icon("search")
     .labels-container.prepend-top-10
       - if can_admin_label
+        %p.text-muted
+          = _('Star a label to make it a priority label. Order the prioritized labels to change their relative priority, by dragging.')
+
         -# Only show it in the first page
         - hide = @available_labels.empty? || (params[:page].present? && params[:page] != '1')
         .prioritized-labels{ class: ('hide' if hide) }
@@ -40,7 +40,7 @@
               = render partial: 'shared/label', subject: @project, collection: @prioritized_labels, as: :label, locals: { force_priority: true }
             - elsif search.present?
               .nothing-here-block
-                = _('No labels with such name or description')
+                = _('No prioritised labels with such name or description')
       - if @labels.present?
         .other-labels
@@ -55,7 +55,7 @@
             %h5
               = _('Other Labels')
           .nothing-here-block
-            = _('No labels with such name or description')
+            = _('No other labels with such name or description')
 - else
   = render 'shared/empty_states/labels'