system: Fix alignment issues in shutdown/restart dialog
system: Fix alignment issues in shutdown/restart dialog

Fixes #13285
Closes #13299
mvollmer/cockpit,garrett/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,garrett/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,deryni/cockpit,deryni/cockpit,cockpit-project/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,mvollmer/cockpit,garrett/cockpit,cockpituous/cockpit,cockpituous/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,garrett/cockpit,deryni/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,deryni/cockpit,deryni/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,garrett/cockpit,mvollmer/cockpit,cockpit-project/cockpit,cockpituous/cockpit,cockpituous/cockpit,deryni/cockpit,cockpit-project/cockpit,deryni/cockpit,martinpitt/cockpit,moraleslazaro/cockpit