Pager: try to fix getPageSize locators

src/org/labkey/test/components/ui/Pager.java

@@ -75,11 +75,10 @@ public int getPageSize()                // only works on GridPanel
         // Changing the jumpToDropdown button from the deprecated DropdownButtonGroup class to a MultiMenu type has changed
         // the way that various text from the control is gathered. Getting the current page size now requires that the dropdown
         // be expanded and the selected page size found in the list.
-
         elementCache().jumpToDropdown.expand();
 
-        // Find the selected li element in the page size list (//div[@class='grid-panel__button-bar']//ul[contains(@aria-labelledby,'current-page-drop')]//li[@class='active'])
-        WebElement activeLi = Locator.tagWithAttributeContaining("ul", "aria-labelledby", "current-page-drop").childTag("li").withAttribute("class", "active").findElement(this);
+        // Find the selected li element in the page size list
+        WebElement activeLi = Locator.byClass("active").findElement(elementCache().jumpToDropdown);
 
         int size = Integer.parseInt(activeLi.getText());
         elementCache().jumpToDropdown.collapse();