Sindbad~EG File Manager

This files describes API changes in the tool_usertours code.

=== 4.0 ===
* The `tourconfig` property returned by the `tool_usertours_fetch_and_start_tour`
  external method has also an `endtourlabel` property that contains the label to be used
  for the end tour button.

=== 3.9 ===
* The `tourconfig` property returned by the `tool_usertours_fetch_and_start_tour`
  external method is now optional, and will be omitted if the tour shouldn't be
  shown to the current user

=== 3.5 ===
* Third party library Popper.js was moved from this plugin into core (core/popper)