[rtags] Allow to 'derive' rtags Since some releases, rtags (structure underlying uicfg) have selector and may be copied using something like: new_rtags = deepcopy(original_rtags) new_rtags.__module__ = __name__ new_rtags.__select__ = custom_selector The problem is that starting from that, both rtags wil diverge and changes in original_rtags won't be considered, while we usually want to set a few specific rules only in new_rtags. To fix this problem, this cset introduces the notion of "derivated/parent" rtag, eg: new_rtags = original_rtags.derive(__name__, custom_selector) Beside easier copying, when using the above method changes in original_rtags which are not overriden by new_rtags will be considered since it only hold its specific rules but look among its parent chain for non-found keys. Along the way, flake8 unittest_rtags. Closes #16164880

/*!
 * FullCalendar v1.6.4 Print Stylesheet
 * Docs & License: http://arshaw.com/fullcalendar/
 * (c) 2013 Adam Shaw
 */

/*
 * Include this stylesheet on your page to get a more printer-friendly calendar.
 * When including this stylesheet, use the media='print' attribute of the <link> tag.
 * Make sure to include this stylesheet IN ADDITION to the regular fullcalendar.css.
 */
 
 
 /* Events
-----------------------------------------------------*/
 
.fc-event {
	background: #fff !important;
	color: #000 !important;
	}
	
/* for vertical events */
	
.fc-event-bg {
	display: none !important;
	}
	
.fc-event .ui-resizable-handle {
	display: none !important;
	}