Url parsing goes wrong when from history

[wfischlein]

Description of the bug / feature

when you use page-history-back (e.g. browser-back-button) for urls with query parameters that are encoded you get wrong values (like this: http://localhost:8080/hello?parameter=V%C3%A4%C3%A4din%20%C3%96y). On page reload the parsing works fine.

Minimal reproducible example

Here is an example. Uncompress it, read the readme for more information urlbug.zip

Expected behavior

Also when using page history to get back to a parametrised url like above ther value should arrive as decoded text in the BeforeEvent of 'setParameter' of implementors of HasUrlParmeter

Versions:

- Vaadin / Flow version: 14.6.6
- Java version: 8
- Application Server (if applicable): spring-boot (embedded tomcat)