i18n - extracting new, pulling from tx

templates - sync from community-templates

Add pxe_loader to host REST

Add the field `pxe_loader` to the GET part of the hosts/
It is possible to set or update (POST, UPDATE), but not to read it

(cherry picked from commit b9f27ad9cb25862180793820eee5210cdc49ff75)

Fixes #18582 - add missing id params to taxonomy apidoc

(cherry picked from commit 9b5a467779b931d7a68f57f1c31bbea309090634)

fixes #17866 - Remove PXE Properties from Gentoo Operatingsystem

The Gentoo Operatingsystem cannot be installed via PXE and can only be provisioned via Image.

Implementing the pxe method causes the exception as described in #[17866](http://projects.theforeman.org/issues/17866)....

fixes #18574 - add ip6 address to the REST api results

(cherry picked from commit 71eb7ee0731726d41d76b839c56db0330e895187)

Fixes #18559 - Order mail notifications by name

(cherry picked from commit 3a10d70170786b8c5583ad95f2e9cb66ffda7ba9)

fixes #18511 - plugin authors shown nicely

(cherry picked from commit d7ad6cbee2a4c4b80dc534cfcfcc919ffa402f87)

refs #18468 - move compute_resources JS to compute profile index

The CR JS should always be ready and loaded on the compute profile
index, as the new attributes form is rendered into the existing page
after the profile is created.

Because the new attributes form is loaded via the two-pane #content...

Fixes #18468 - Include JS in libvirt compute profile form

When the form is loaded via XHR the needed JavaScript
is not loaded and selecting of certain attributes fail.
(cherry picked from commit ec7fc1bd9f6ec77a90287f77092ad1f57fc92790)