Werk #13573: Reenable ntopng flows page

Component	Ntopng integration
Title	Reenable ntopng flows page
Date	Feb 2, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p20 Checkmk Enterprise (CEE), Checkmk MSP (CME)

This is a regression after introducing the vlan awareness: the ntopng flows were not displayed anymore. This is fixed now.

To the list of all Werks