added search modal for timesheet export (#2728)

templates/embeds/modal.html.twig

@@ -4,7 +4,7 @@ REQUIRED CHANGES NEED TO BE DONE IN THESE FILES:
  - default/_form_modal.html.twig 
  #}
 <div class="modal{% if block('modal_class') is defined %} {{ block('modal_class') }}{% endif %}" id="{{ block('modal_id') }}" tabindex="-1" role="dialog" aria-labelledby="{{ block('modal_id') }}_label">
-    <div class="modal-dialog modal-lg" role="document">
+    <div class="modal-dialog {% block modal_size %}modal-lg{% endblock %}" role="document">
         <div class="modal-content">
             {% if block('modal_before') is defined %}{{ block('modal_before') }}{% endif %}
             <div class="modal-header">