Check support for new user names

[crycode-de]

To send a message using the new user names the user names have to be extended by #0. e.g. crycode#0

Additionally the userTag in the adapter is then shown as username#0.

ToDo

• [x] Check if there any RegEx checks against the old user tag style
• [x] Check if we can skip the display/extend of #0
• [x] Update blockly
• [x] Update docs

[crycode-de]

Done in release v2.1.0