basic openstack support

fixes #1726 Template editor doesn't seem to work with IE

[UI] - convert all bulk operations into buttons

Update first-run splash page with a note about Smart Proxies, fixes #1721

adds missing EC2 propetries view

use file reader for the config template file upload.

fixed dropdown location for action button and bookmark.

[UI] - added missing label classes

remove unneded hidden links in the more tab

ensures that compute resources are shown in the host form only if provisioning is enabled