Fix ServerShell not being able to handle plugin assets.

Fixes #3575
BC fixes for habtm. Closes #3545.

Signed-off-by: Rachman Chavik <rchavik@xintesa.com>
Merge branch '2.2'
BC fixes for disabled checkboxes

see: d504642
see: #3545

Signed-off-by: Rachman Chavik <rchavik@xintesa.com>