FIX correct userform reference & avoid submit errors

[NightJar]

"Uncaught TypeError: Cannot read property 'data' of undefined
Was being reported when attempting to submit a form, which would
then trigger the "are you sure" functionality which should only
show when attempting to browse away from a page when changes to the
form have been made.

[NightJar]

Warning: as yet untested. Hopefully a fix for #868 - but as I cannot reproduce I would like @extravio, @guyvanbael, or @purplespider to give it a test for me.

[NightJar]

:( The Travis CI builds are faililng... however this is only a single case, and only because of phpcs incorrectly identifying the expected number of spaces for indentation.
I've raised an issue here, and will not be attempting to fix the build.
squizlabs/PHP_CodeSniffer#2459

---

Confirmed and already fixed by phpcs team, due with the 3.4.2 release

which is expected reasonably soon.

:)

[kinglozzer]

LGTM! I wonder if that phpcs issue is also the cause of the weird PHP errors we’ve been seeing in framework/other modules...

[robbieaverill]

Yeah it’ll affect all of our builds until they release the next patch version

[extravio]

@NightJar Tested successfully.
This fixes both the "Uncaught TypeError: Cannot read property 'data' of undefined" and issue #868

[NightJar]

Thanks for confirming @extravio !