VM Datastores: fix hover text

https://bugzilla.redhat.com/show_bug.cgi?id=1114706
Merge pull request #292 from mzazrivec/vm_datastores_fix_hover_text

Fix hover text for datastores in VM's overview
Precompile assets prior to building tarball

https://bugzilla.redhat.com/show_bug.cgi?id=1121202