Fixes #18474 - Add Patternfly empty page for OSs

Fixes #17872 - Update button label from New to Create

Based on PatternFly Terminology and Wording suggestions
Don't recommend to use New, so update New to Create.

Fixes #12193 - Stop using counter_cache for host[group] counts

This is aimed to prevent deadlocks caused by Rails' implementation of
counter_cache that is hit when multiple hosts are created or updated at
the same time. An added benefit is that the counters will now display...

Fixes #13164 - Add view_params permission

A new view_params permission was added for parameters inheriting from
Parameter object. The only exception is global parameters, which are
already handled by filter for CommonParameter resource.

This new permissions is also automatically added to viewer and site...

Fixes #12945 - use helper for table css classes

Fixes #14395 - Label for provision template capitalized in os details page

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Fixes #12979 - Create helper for "new" button

Previously the button classes were applied to new buttons using jQuery.
This commit creates a `new_link` helper that makes sure all new buttons
will receive the correct class and only display if authorized. Also a...

Fixes #13279 - Adapt alerts to Patternfly

Currently our alerts have a h4 header, then a text. Alerts on Patternfly
are meant to have a bold title, then the content, like one can see in
https://www.patternfly.org/widgets/#alerts

Fixes #13070 - making actions column consistent

Fixes #4629 - Migrate UI to Patternfly