[!!!][BUGFIX] Allow browser notifications only on encrypted connection

Google Chrome deprecated the browser notification API for unencrypted
origins. For this reason we now use an additional check to prevent
deprecation warnings in the console and disable this feature for
instances without SSL/TLS.

Resolves: #83971
Releases: master, 8.7
Change-Id: I9721842159e7ad3da9e5f4ee93a9bce3eaf5d0eb
Reviewed-on: https://review.typo3.org/55916


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Tested-by: Sascha Egerer <sascha@sascha-egerer.de>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Tested-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>