test: Fix race in check-networking when IPv4 block is rerendered
test: Fix race in check-networking when IPv4 block is rerendered

Wait for the IPv4 block to be displayed properly before looking
at what it contains.

Closes #5661
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

deryni/cockpit,larskarlitski/cockpit,stefwalter/cockpit,martinpitt/cockpit,xhad/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,garrett/cockpit,harishanand95/cockpit,arilivigni/cockpit,garrett/cockpit,garrett/cockpit,stefwalter/cockpit,cockpit-project/cockpit,sgallagher/cockpit,andreasn/cockpit,deryni/cockpit,cockpit-project/cockpit,martinpitt/cockpit,cockpit-project/cockpit,petervo/cockpit,dperpeet/cockpit,moraleslazaro/cockpit,arilivigni/cockpit,petervo/cockpit,moraleslazaro/cockpit,larsu/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,vanloswang/cockpit,xhad/cockpit,mvollmer/cockpit,cockpituous/cockpit,martinpitt/cockpit,harishanand95/cockpit,Scribery/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,deryni/cockpit,larskarlitski/cockpit,larsu/cockpit,mareklibra/cockpit,vanloswang/cockpit,dperpeet/cockpit,harishanand95/cockpit,larskarlitski/cockpit,mareklibra/cockpit,Scribery/cockpit,dperpeet/cockpit,martinpitt/cockpit,andreasn/cockpit,sgallagher/cockpit,mareklibra/cockpit,larskarlitski/cockpit,harishanand95/cockpit,sgallagher/cockpit,andreasn/cockpit,arilivigni/cockpit,michalskrivanek/cockpit,larsu/cockpit,harishanand95/cockpit,sgallagher/cockpit,mareklibra/cockpit,cockpituous/cockpit,garrett/cockpit,mvollmer/cockpit,dperpeet/cockpit,larskarlitski/cockpit,michalskrivanek/cockpit,garrett/cockpit,andreasn/cockpit,cockpituous/cockpit,arilivigni/cockpit,larskarlitski/cockpit,michalskrivanek/cockpit,SotolitoLabs/cockpit,larsu/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,dperpeet/cockpit,mvollmer/cockpit,SotolitoLabs/cockpit,xhad/cockpit,xhad/cockpit,cockpituous/cockpit,petervo/cockpit,larsu/cockpit,vanloswang/cockpit,michalskrivanek/cockpit,martinpitt/cockpit,sgallagher/cockpit,mareklibra/cockpit,petervo/cockpit,michalskrivanek/cockpit,larskarlitski/cockpit,vanloswang/cockpit,dperpeet/cockpit,larsu/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,arilivigni/cockpit,cockpit-project/cockpit,arilivigni/cockpit,deryni/cockpit,xhad/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,andreasn/cockpit,harishanand95/cockpit,moraleslazaro/cockpit,vanloswang/cockpit,xhad/cockpit,arilivigni/cockpit,SotolitoLabs/cockpit,deryni/cockpit,andreasn/cockpit,stefwalter/cockpit,petervo/cockpit,sgallagher/cockpit,sgallagher/cockpit,Scribery/cockpit,mareklibra/cockpit,Scribery/cockpit,michalskrivanek/cockpit,deryni/cockpit,cockpituous/cockpit,vanloswang/cockpit,deryni/cockpit,harishanand95/cockpit,dperpeet/cockpit,petervo/cockpit,xhad/cockpit,SotolitoLabs/cockpit,petervo/cockpit,mvollmer/cockpit,Scribery/cockpit,mvollmer/cockpit,michalskrivanek/cockpit,Scribery/cockpit,vanloswang/cockpit,cockpit-project/cockpit,Scribery/cockpit