Merge branch '633-table-header' into 'devel_12.1.x'

word wrapping for Firefox fixed; word wrapping is disabled for xolumns that don't require it

See merge request !571
1 job for devel_12.1.x in 1 minute and 54 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #43131
test_frontend

00:01:54