Removed max height from widget modal body

IPython/html/static/notebook/js/widgets/container.js

@@ -91,6 +91,7 @@ define(["notebook/js/widget"], function(widget_manager) {
                 .appendTo(this.$title_bar);
             this.$body = $('<div />')
                 .addClass('modal-body')
+                .addClass('widget-modal-body')
                 .addClass('widget-container')
                 .appendTo(this.$window);
             

IPython/html/static/notebook/less/widgets.less

@@ -222,6 +222,11 @@ The widget area typically looks something like this:
     margin-left: 0px !important;
 }
 
+/* ContainerWidget - ModalView Body */
+.widget-modal-body {
+    max-height: none !important;
+}
+
 /* ContainerWidget */
 .widget-container {
     .border-box-sizing();