no-jira: harden some selenium tests

src/test/java/org/olat/selenium/page/forum/ForumPage.java

@@ -204,7 +204,7 @@ public class ForumPage {
 	public ForumPage replyToMessageNoWait(String reference, String title, String reply) {
 		By replyBy = By.xpath("//div[contains(@class,'o_forum_message')][//h4[contains(text(),'" + reference + "')]]//a[contains(@class,'o_sel_forum_reply')]");
 		OOGraphene.waitElement(replyBy, browser);
-		browser.findElement(replyBy).click();
+		OOGraphene.click(replyBy, browser);
 		OOGraphene.waitBusy(browser);
 		OOGraphene.waitModalDialog(browser);
 		

src/test/java/org/olat/selenium/page/user/UserAdminPage.java

@@ -211,7 +211,7 @@ public class UserAdminPage {
 		browser.findElement(usernameBy).sendKeys(username);
 		
 		By searchBy = By.cssSelector(".o_sel_user_search_form a.btn-default");
-		browser.findElement(searchBy).click();
+		OOGraphene.click(searchBy, browser);
 		OOGraphene.waitBusy(browser);
 		return this;
 	}