shellDBus: Rename ShowMonitorLabels2 to ShowMonitorLabels

The original ShowMonitorLabels has been removed so we can change things
back to use ShowMonitorLabels again.

!491
4 jobs for !491 with benzea/rename-show-monitor-labels in 5 minutes and 3 seconds (queued for 4 seconds)
detached
Status Job ID Name Coverage
  Review
passed #355024
check_commit_log

00:00:30

 
  Build
passed #355025
build

00:03:33

 
  Test
passed #355026
test

00:00:59

passed #355027
test-pot

00:00:58