Fix class colors on events went missing

calendar/templates/default/app.css

@@ -355,8 +355,10 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
  *  border-color: depending on category
  *  background: depending on category (shade)
  *
- * These are defaults:
  */
+}
+.calendar_calEvent:not([class*="cat_"]) {
+	/* Defaults for no category, so we don't override it */
 	background-color: #808080;
 	border-color: #808080;
 }

calendar/templates/pixelegg/app.css

@@ -866,6 +866,7 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
   overflow: auto;
 }
 .calendar_calAddEvent {
+  position: absolute;
   width: 100%;
   z-index: 10;
 }