shell: render dashboard less often
shell: render dashboard less often

Closes #2418
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

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