Fixes #4519, #9531 - Correctly handle invalid host name changes

Removing a host name or otherwise changing it to an invalid name (such
as a name containing /) caused the form to fail loading. This makes sure
all paths are generated correctly and validation error is shown....

Fixes #16782 - reset dhcp record cache after mac change

(cherry picked from commit 969832057c5ea6a1f84eaf5c53f5cdc7ee445af2)

Fixes #17808 - fix 'multipart form data' IE bug

According to this bug
(https://connect.microsoft.com/IE/Feedback/Details/868498),
multipart form data is malformed if there are fields without names.
This bug has been solved within Edge browser,
however no solution is expected for IE10/IE11...

Fixes #5483,#11106 - pass the virtualswitch value to fog

We can't pass the network id directly to the fog, but it accepts the
virtualswitch parameter, that we can use to point to the right value.

Also, it fixes another issue, where we used the vsphere network id to...

Fixes #17570 - Only execute `onContentLoad` once per page

When an event is triggered, jQuery attempts to execute the on<name>
method if it exists for event <name>. We were also manually triggering
the `onContentLoad` every time the `ContentLoad` event was triggered,...

Fixes #17592 - dont truncate on audit details page

(cherry picked from commit 14700117ac6a653c0904c5b13bf570bc81a5cd28)

Fixes #17457 - multiple_checkboxes doesn't work with orgs/locs

multiple_checkboxes calls ActiveModel::Naming on associations that could
be simply "Taxonomy". This results on a 500 error 'undefined method
`taxonomies' for #<Filter:0x005593624bdd18>' (or whatever other class...

Fixes #17846 - auth_source_ldaps API now displays taxonomies

(cherry picked from commit 65c093a57f743567146012c3dfdae3653369218e)

fixes #17838 - translate New Hosts title string

(cherry picked from commit 103d467fc4210d2ed14782dcfd0890003eedc473)

templates - sync from community-templates