The pipe character (`"|"`) cannot be used in survey element names and titles

[andrewtelnov]

FIXED

settings.itemValueSeparator now accepts an empty string (""). When set, no separator character is used, which makes it possible to include the pipe (|) in element names and titles.

import { settings } from "survey-core";
settings.itemValueSeparator = "";

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The JSON and full video is availble in this private ticket.
The behavior is pretty weird. We should fix it in the current sprint.

The reason was of using "|" in the page.name. We should to implement the following:

1. Allow to make settings.itemValueSeparator empty
2. Do not allow to enter into page/panel/question name the settings.itemValueSeparator character.