[e2t] Clear out all non-replaced tokens before showing the message.

e2t: Fix FormStep validation for flexible selectors.

Katharina Zwinger authored Oct 15, 2018 and Roman Zimmermann committed Oct 15, 2018

[opt in] Use inverted #states-rule so either checkbox or radio labels are shown.

e2t: Add token support for nested contact fields (ie. trust.country).

A new concept named “stub targets“ is introduced. These are targets
without an email address that can only ever match an exclusion, never a
message.

Flexible selectors.

Fixes in embed.js

Custom datasets.

This has become problematic with the introduction of custom datasets as
now the metadata changes more often.

- register/call handlers not on script loading, but onload or later

Fix: Using isset() to field instances doesn’t work for new entities.

The statement termination (`;`) leads to all following assignments to
pollute the global namespace (`window`).
This should just be `,` so that the statements stay in function scope.

'*' is a "repeater", on it's own it is not valid in `new RegExp(str)`

String.prototype.match() returns `null` if there were no matches – `null` doesn’t have a length property.