Fix problem with the end date still being visible when multi-day book…

…ings are not allowed.

web/css/mrbs.css.php

@@ -63,6 +63,10 @@
   box-sizing: border-box;
 }
 
+.hidden_field {
+  visibility: hidden;
+}
+
 <?php
 // <input> elements of type 'date' are converted by the JavaScript into datepickers.
 // In order to prevent the display shifting about during the conversion process we set

web/edit_entry.php

@@ -359,14 +359,14 @@ function get_field_end_time(int $value, bool $disabled=false) : FieldDiv
       'value'       => $end_date,
       'aria-label'  => $label,
       'disabled'    => $disabled,
-      'required'    => true)
-    );
+      'required'    => true
+    ));
 
   // Don't show the end date if multiday bookings are not allowed
   if (!$multiday_allowed)
   {
-    $element_date->setAttributes(array('style'    => 'visibility: hidden',
-                                       'disabled' => true));
+    $element_date->setAttribute('disabled', true)
+                 ->addClass('hidden_field');
   }
 
   $a = $areas[$area_id];