Calendar: Fix current time line sometimes missing in planner view

calendar/js/et2_widget_planner.js

@@ -852,6 +852,7 @@ var et2_calendar_planner = /** @class */ (function (_super) {
             return false;
         }
         this.now_div.appendTo(this.grid)
+            .show()
             .css('left', row._time_to_position(now) + '%');
     };
     /**

calendar/js/et2_widget_planner.ts

@@ -1095,6 +1095,7 @@ export class et2_calendar_planner extends et2_calendar_view implements et2_IDeta
 			return false;
 		}
 		this.now_div.appendTo(this.grid)
+		    .show()
 		    .css('left', row._time_to_position(now) + '%');
 	}