Apply text input styling to 'tel' inputs too

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

core/css/guest.css

@@ -148,6 +148,7 @@ select {
 	cursor: pointer;
 }
 input[type='text'],
+input[type='tel'],
 input[type='password'],
 input[type='email'] {
 	width: 249px;