Merge remote-tracking branch 'origin/form' into form

www/form/app-form.less

@@ -275,6 +275,11 @@
                         input:invalid {
                             border: 1px solid @cp_form-invalid;
                         }
+                        media-tag {
+                            & > * {
+                                max-width: 100%;
+                            }
+                        }
                     }
                     .cp-form-input-block {
                         //width: @form_input-width;

www/form/inner.js

@@ -490,6 +490,7 @@ define([
                     $(addMultiple).hide();
                 }
             } else {
+                $(addMultiple).hide();
                 $calendar.show();
                 $container.hide();
             }