shell: Watch Docker directory as superuser.
shell: Watch Docker directory as superuser.

Since all other access to Docker is also done as superuser, and we
might miss changes to the list of images otherwise.

Closes #2301
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

Thermionix/cockpit,garrett/cockpit,larskarlitski/cockpit,fridex/cockpit,mvollmer/cockpit,xhad/cockpit,firebitsbr/cockpit,martinpitt/cockpit,harishanand95/cockpit,stefwalter/cockpit,dperpeet/cockpit,moraleslazaro/cockpit,nmav/cockpit,vanloswang/cockpit,xhad/cockpit,Scribery/cockpit,Armstrong1992/cockpit,garrett/cockpit,vbatts/cockpit,vbatts/cockpit,vanloswang/cockpit,andreasn/cockpit,denysvitali/cockpit,michalskrivanek/cockpit,fridex/cockpit,vbatts/cockpit,dperpeet/cockpit,cockpit-project/cockpit,jscotka/cockpit,larsu/cockpit,zigitax/cockpit,larskarlitski/cockpit,harishanand95/cockpit,cockpituous/cockpit,vbatts/cockpit,deryni/cockpit,stefwalter/cockpit,mareklibra/cockpit,nmav/cockpit,dperpeet/cockpit,stefwalter/cockpit,sgallagher/cockpit,xhad/cockpit,andreasn/cockpit,netzvieh/cockpit,FireDrunk/cockpit,moolitayer/cockpit,martinpitt/cockpit,evol262/cockpit,darioajr/cockpit,arilivigni/cockpit,Scribery/cockpit,SotolitoLabs/cockpit,moraleslazaro/cockpit,darioajr/cockpit,larskarlitski/cockpit,darioajr/cockpit,moraleslazaro/cockpit,andreasn/cockpit,Thermionix/cockpit,moraleslazaro/cockpit,netzvieh/cockpit,sgallagher/cockpit,arilivigni/cockpit,sgallagher/cockpit,Armstrong1992/cockpit,mareklibra/cockpit,mvollmer/cockpit,denysvitali/cockpit,deryni/cockpit,evol262/cockpit,maxamillion/cockpit,stefwalter/cockpit,FireDrunk/cockpit,sgallagher/cockpit,dperpeet/cockpit,harishanand95/cockpit,fridex/cockpit,deryni/cockpit,haiyangd/cockpit_view,cockpit-project/cockpit,andreasn/cockpit,larsu/cockpit,petervo/cockpit,mareklibra/cockpit,netzvieh/cockpit,nmav/cockpit,SotolitoLabs/cockpit,jscotka/cockpit,martinpitt/cockpit,petervo/cockpit,arilivigni/cockpit,Thermionix/cockpit,deryni/cockpit,zigitax/cockpit,sgallagher/cockpit,dperpeet/cockpit,vanloswang/cockpit,denysvitali/cockpit,larskarlitski/cockpit,Thermionix/cockpit,jscotka/cockpit,xhad/cockpit,larsu/cockpit,netzvieh/cockpit,zigitax/cockpit,firebitsbr/cockpit,moolitayer/cockpit,FireDrunk/cockpit,michalskrivanek/cockpit,xhad/cockpit,darioajr/cockpit,evol262/cockpit,denysvitali/cockpit,denysvitali/cockpit,mareklibra/cockpit,mvollmer/cockpit,moolitayer/cockpit,SotolitoLabs/cockpit,FireDrunk/cockpit,moraleslazaro/cockpit,michalskrivanek/cockpit,martinpitt/cockpit,michalskrivanek/cockpit,vbatts/cockpit,fridex/cockpit,SotolitoLabs/cockpit,jscotka/cockpit,moolitayer/cockpit,nmav/cockpit,matobet/cockpit,xhad/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,petervo/cockpit,michalskrivanek/cockpit,harishanand95/cockpit,Scribery/cockpit,larsu/cockpit,sgallagher/cockpit,garrett/cockpit,zigitax/cockpit,Scribery/cockpit,firebitsbr/cockpit,moraleslazaro/cockpit,maxamillion/cockpit,harishanand95/cockpit,mareklibra/cockpit,cockpituous/cockpit,larsu/cockpit,jscotka/cockpit,netzvieh/cockpit,firebitsbr/cockpit,harishanand95/cockpit,matobet/cockpit,haiyangd/cockpit_view,SotolitoLabs/cockpit,garrett/cockpit,Scribery/cockpit,deryni/cockpit,vanloswang/cockpit,moolitayer/cockpit,andreasn/cockpit,Armstrong1992/cockpit,matobet/cockpit,fridex/cockpit,fridex/cockpit,mareklibra/cockpit,sgallagher/cockpit,arilivigni/cockpit,mareklibra/cockpit,andreasn/cockpit,jscotka/cockpit,michalskrivanek/cockpit,matobet/cockpit,garrett/cockpit,andreasn/cockpit,matobet/cockpit,zigitax/cockpit,netzvieh/cockpit,arilivigni/cockpit,Thermionix/cockpit,larskarlitski/cockpit,evol262/cockpit,vbatts/cockpit,larsu/cockpit,maxamillion/cockpit,cockpit-project/cockpit,SotolitoLabs/cockpit,maxamillion/cockpit,arilivigni/cockpit,Scribery/cockpit,petervo/cockpit,nmav/cockpit,haiyangd/cockpit_view,maxamillion/cockpit,FireDrunk/cockpit,haiyangd/cockpit_view,mvollmer/cockpit,vanloswang/cockpit,cockpit-project/cockpit,evol262/cockpit,matobet/cockpit,Armstrong1992/cockpit,Scribery/cockpit,Thermionix/cockpit,dperpeet/cockpit,deryni/cockpit,michalskrivanek/cockpit,harishanand95/cockpit,larskarlitski/cockpit,xhad/cockpit,stefwalter/cockpit,vanloswang/cockpit,petervo/cockpit,firebitsbr/cockpit,stefwalter/cockpit,larskarlitski/cockpit,petervo/cockpit,cockpituous/cockpit,cockpituous/cockpit,vanloswang/cockpit,haiyangd/cockpit_view,Armstrong1992/cockpit,martinpitt/cockpit,dperpeet/cockpit,deryni/cockpit,arilivigni/cockpit,mvollmer/cockpit,cockpit-project/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,darioajr/cockpit,cockpituous/cockpit,evol262/cockpit,petervo/cockpit