app/views/context_menus/tt_bookings_list.html.erb
<ul>
<% unless @time_booking_ids.nil? %>
<li><%= context_menu_link l(:button_edit), {:controller => 'time_bookings', :action => 'show_edit', :time_booking_ids => @time_booking_ids},
:class => 'icon-edit', :remote => true, :disabled => !User.current.allowed_to_globally?({:controller => 'time_bookings', :action => 'show_edit'}, {}) %>
</li>
<li><%= context_menu_link l(:time_tracker_label_delete), {:controller => 'time_bookings', :action => 'delete', :time_booking_ids => @time_booking_ids},
:class => 'icon-del', :remote => false, :disabled => !User.current.allowed_to_globally?({:controller => 'time_bookings', :action => 'delete'}, {}) %>
</li>
<% end %>
</ul>