Adds _required_ parameter to search widget. Fixes ietf-tools#1832.

 - Legacy-Id: 15338

Author: jimfenton

ietf/templates/base.html

@@ -76,7 +76,7 @@
 
 	    <form class="navbar-form navbar-right hidden-xs" action="/doc/search/">
 	      <div class="form-group">
-	        <input class="form-control input-sm" type="text" name="name" placeholder="Document search">
+	        <input class="form-control input-sm" type="text" name="name" placeholder="Document search" required>
 	        <input type="hidden" name="activedrafts" value="on">
 	        <input type="hidden" name="rfcs" value="on">
 	      </div>