fix: datepicker selection works on IE (#623)

Author: vladitasev

packages/base/src/RenderScheduler.js

@@ -114,7 +114,7 @@ class RenderScheduler {
 	}
 
 	static getNotDefinedComponents() {
-		return Array.from(document.querySelectorAll(":not(:defined)")).filter(el => el.localName.startsWith("ui5-"));
+		return Array.from(document.querySelectorAll("*")).filter(el => el.localName.startsWith("ui5-") && !el._isUI5Element);
 	}
 
 	/**

packages/main/src/DayPicker.js

@@ -255,10 +255,6 @@ class DayPicker extends UI5Element {
 	onclick(event) {
 		const target = getShadowDOMTarget(event);
 
-		if (target.className.indexOf("sapWCDayPickerItem") === -1) {
-			return;
-		}
-
 		const dayPressed = this._isDayPressed(target);
 
 		if (dayPressed) {
@@ -386,7 +382,7 @@ class DayPicker extends UI5Element {
 
 	_isDayPressed(target) {
 		const targetParent = target.parentNode;
-		return (target.className.indexOf("sapWCDayPickerItem") > -1) || (targetParent && targetParent.className.indexOf("sapWCDayPickerItem") > -1);
+		return (target.className.indexOf("sapWCDayPickerItem") > -1) || (targetParent && target.parentNode.classList.contains("sapWCDayPickerItem"));
 	}
 
 	_getVisibleDays(oStartDate, bIncludeBCDates) {