Add polyfill for endsWith

Author: WilliamBZA

src/ServicePulse.Host/app/index.html

@@ -240,5 +240,6 @@ <h4>Warning!</h4>
 
     <!--Polyfills-->
     <script src="js/polyfill/array.prototype.find.js"></script>
+    <script src="js/polyfill/string.prototype.endsWith.js"></script>
 </body>
 </html>

src/ServicePulse.Host/app/js/polyfill/string.prototype.endsWith.js

@@ -0,0 +1,11 @@
+// Code taken from MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith#Polyfill
+// which is shared using the following license: cc-by-sa 2.5 https://creativecommons.org/licenses/by-sa/2.5/
+// https://tc39.github.io/ecma262/#sec-array.prototype.find
+if (!String.prototype.endsWith) {
+	String.prototype.endsWith = function(search, this_len) {
+		if (this_len === undefined || this_len > this.length) {
+			this_len = this.length;
+		}
+		return this.substring(this_len - search.length, this_len) === search;
+	};
+}