Fix warning 'Theme Standard not found, fallback to default'

when new config is generated
3 jobs for master in 3 minutes and 52 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #18039
run-appdata

00:00:04

passed #18038
run-tests

00:03:33

 
  Build
passed #18040
run-build

00:00:13