Revert "RegisterWithLevelEditor systeem op de schop genomen"

This reverts commit 9e187fe2ea9e81cbc58bba0d175dc3a43a0abe3f.
Revert "Revert "RegisterWithLevelEditor systeem op de schop genomen""

This reverts commit 7e25521c2ba416071ef5e1704576d904cb381ead.
Revert "Revert "Revert "RegisterWithLevelEditor systeem op de schop genomen"""

This reverts commit 49aab69297ba367fd3df9ce647c52ad3f078ea92.
Kleine optimalisaties doorgevoerd