Event/tickets: use same color as label for Heading cells

Author: shubham-padia

app/templates/gentelella/admin/event/tickets/tickets.html

@@ -175,13 +175,13 @@ <h3>{{ _("Tickets Summary") }}
                     {{ _("Tickets Capacity Set") }}
                 </th>
 
-                <th colspan="2" class="success">
+                <th colspan="2" style="color:white" class="label-success">
                     {{ _("Completed Orders") }}
                 </th>
-                <th colspan="2" class="info">
+                <th colspan="2" style="color:white" class="label-info">
                     {{ _("Placed Orders") }}
                 </th>
-                <th colspan="2" class="warning">
+                <th colspan="2" style="color:white" class="label-warning">
                     {{ _("Pending Orders") }}
                 </th>
             </tr>