[BUGFIX] Fix jumpToUrl()-Usage in Element Browser

The Javascript functions jumpToUrl(URL,anchor) and jumpToUrl(URL,formEl)
cannot be used interchangeably. This leads to a javascript error,
because the formElement is rendered as string
("[object HTMLInputElement]").

Resolves: #50437
Releases: 6.0, 6.1, 6.2
Change-Id: I53e1be3c157a2ef6c646f02af15e8c746b6e6375
Reviewed-on: https://review.typo3.org/24094
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn