Since the ExtJS viewport refactoring in 8.5, it is not possible
anymore to load any other registered navigation component,
which makes EXT:commerce to not work anymore.

The patch changes the hard-coded pagetree app component
to fetch it from the pool of available navigation components.

Resolves: #80058
Releases: master, 8.7
Change-Id: I49be1b0b231f6085a7a9e9d5c633b073a92ad301
Reviewed-on: https://review.typo3.org/53477


Reviewed-by: Sebastian Fischer <typo3@evoweb.de>
Tested-by: Sebastian Fischer <typo3@evoweb.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>