Add placeholder loader for Track Panel (#577)

7 jobs for dev in 4 minutes and 29 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test Build Static
passed #565545
Test_N_Build

00:03:21

 
  Build Docker Images
passed #565546
Nginx:Staging

00:00:50

passed #565547
Node:Staging

00:00:58

 
  Deploy
passed #565551
Pub:Staging-HL

00:00:07

passed #565549
Pub:Staging-HX

00:00:07

passed #565550
Staging:HL

00:00:07

passed #565548
Staging:HX

00:00:08