added fix for Page Should Contain Element not accepting lists

atest/acceptance/locators/locator_parsing.robot

@@ -47,6 +47,15 @@ Multiple Locators with double arrows as separator should work
 Multiple Locators strategy should be case-insensitive
     Page Should Contain Element    cSs=div#div_id >> XpaTh=a[6] >> iD=image1_id
 
+Multiple Locators as a List should work
+    ${element} =   Get WebElement    id:foo:bar
+    ${locator_list} =    Create List    id:div_id    ${element}    id:bar=foo
+    Page Should Contain Element    ${locator_list}
+
+WebElement as locator should work
+    ${element} =   Get WebElement    id:foo:bar
+    Page Should Contain Element    ${element}
+
 When One Of Locator From Multiple Locators Is Not Found Keyword Fails
     Run Keyword And Expect Error
     ...    Element with locator 'id:not_here' not found.

src/SeleniumLibrary/keywords/element.py

@@ -143,7 +143,7 @@ def page_should_contain(self, text: str, loglevel: str = "TRACE"):
     @keyword
     def page_should_contain_element(
         self,
-        locator: Union[WebElement, str],
+        locator: Union[WebElement, str, List[Union[WebElement,str]]],
         message: Optional[str] = None,
         loglevel: str = "TRACE",
         limit: Optional[int] = None,