Update Form.php

tiny typo
Merge pull request #3193 from phillprice/patch-3

Update Form.php
BUG Sanitise the PHP output.
Merge pull request #3196 from mateusz/patch-html-editor-field

BUG Sanitise the PHP output.
Versioned no longer sets redundant session data
Merge pull request #3198 from tractorcow/pulls/3.1/lazy-session

Versioned no longer sets redundant session data
Provide minimal sample code for front-end RTE
Add screenshot.
fixup! Provide minimal sample code for front-end RTE