Adapt CasC test to new UI changes (#2605)

---------

Co-authored-by: Tim Jacomb <21194782+timja@users.noreply.github.com>

Author: RanjitCS

pom.xml

@@ -787,7 +787,7 @@ and
       <id>lts</id>
       <properties>
         <!--RENOVATE-LTS-->
-        <jenkins.version>2.528.3</jenkins.version>
+        <jenkins.version>2.541.1</jenkins.version>
       </properties>
     </profile>
   </profiles>

src/main/java/org/jenkinsci/test/acceptance/plugins/configuration_as_code/JcascManage.java

@@ -28,10 +28,13 @@
 import static org.hamcrest.Matchers.not;
 
 import java.time.Duration;
+import org.jenkinsci.test.acceptance.po.Conditions;
 import org.jenkinsci.test.acceptance.po.Control;
 import org.jenkinsci.test.acceptance.po.FormValidation;
 import org.jenkinsci.test.acceptance.po.Jenkins;
 import org.jenkinsci.test.acceptance.po.PageObject;
+import org.openqa.selenium.By;
+import org.openqa.selenium.NoSuchElementException;
 
 public class JcascManage extends PageObject {
     public JcascManage(Jenkins jenkins) {
@@ -42,6 +45,14 @@ public JcascManage(Jenkins jenkins) {
      * Configure and apply the new source
      */
     public void configure(String path) {
+        visit("#new");
+
+        waitFor(driver)
+                .withTimeout(Duration.ofSeconds(10))
+                .pollingEvery(Duration.ofMillis(100))
+                .ignoring(NoSuchElementException.class)
+                .until(Conditions.waitForElementAnimationToFinish(By.cssSelector("dialog[open]")));
+
         Control control = control("/newSource");
         control.set(path);
         waitFor()
@@ -54,12 +65,12 @@ public void configure(String path) {
                     return true;
                 });
 
-        clickButton("Apply new configuration");
+        clickButton("Apply configuration");
         verifySuccessfulApplication();
     }
 
     public void reload() {
-        clickButton("Reload existing configuration");
+        find(by.name("reload")).click();
         verifySuccessfulApplication();
     }