TYPO3 Core

The view icon in the backend to open a specific page of the website frontend does not work properly:
1) If the current backend domain (e.g. editor.mydomain.com) is not configured in sys_domain but another domain is defined for the current page to be view - the more specific domain is not used at all
2) If a specific domain is used for a page to be viewed and TYPO3 is installed in a sub-directory, this sub-directory is not considered at all

(issue imported from #M13861)