[UI] - convert all bulk operations into buttons

fixes #1747 host selected puppet classes are afected by the classes filter.

fixes #1746 selecting a cluster in oVirt remove subnet and ip from the network tab in new/edit host

use file reader for the config template file upload.

fixed dropdown location for action button and bookmark.

fixes #1165 add inherited params display and override option to the host form.

Signed-off-by: Ohad Levy <ohadlevy@gmail.com>

fixes #1726 ie support for edit template (with a simple text-box).

make sure that info messages are not shown when filtering is enabled refs #1634

fixes #1712 When Ec2 provisioning, resolve button shouldn't show pxe nor provisioning template.

added commit comment, history and preview to the template editor.