TYPO3 Core

Just a few small changes to allow overriding the fields displayed in both listView and SingleView via typoscript like:
plugin.tx_newloginbox_pi3.singleView.fieldList = username,name,email
plugin.tx_newloginbox_pi3.listView.fieldList = username,name,email,city,country

and similarly, a comma separated pidList like:
plugin.tx_newloginbox_pi3.pidList = 123,234,456,456

There is no need to explicitly set manualFieldOrder like you do in the flex form but I added an extra clause, to ensure there was actually a field list for both details and list individually.

(issue imported from #M4433)