[iOS] creating form disables text entering

[Matthew Leffler]

Summary:

When using iOS to create a form, the keyboard is disabled.

Steps:

1. Use iOS5+
2. Load the Full-featured demo (ie, 5 line toolbar)
3. Clear the content using Source View.
4. Switch to wysiwyg and click the Form button
5. Insert a form and move your cursor inside of it
6. Insert a text field in the form.

Expected result:

The cursor should be positioned after the new field and I should be able to enter new text using my keyboard.

Actual result:

The cursor is positioned after the field but I can type away and no characters are entered.