TYPO3 Core

From T3 4.0b2 to 4.0b3 the method in the admin panel form has changed from post to get. This results in wrong behavior. Clicking the update button loads the first page.

Reason is the combination of GET parameters in the action URL and the method GET. For example after submitting the following form, the server will ONLY receive the xy parameter, but not the id.
<form action="index.php?id=1234" method="get">
<input type="submit" />
<input type="hidden" name="xy" value="4321" />
</form>

Solution: Replace get with post again.
Other solution: Implement hidden fields with the parameters from the action URL.
Maybe simulate static documents will do as a workaround.
(issue imported from #M2798)