fixes #14200 - exclude form templates from select2 initialisation

Form templates shouldn't be initialised with select2, as the elements
are copied through add_child_node, e.g. when adding a new external user
group inside the user group form. add_child_node calls select2 after...

Fixes #14182 - authorize role index

Fixes #14204 - list only bridges for bridged networking

fixes #13980 - don't merge NIC compute attrs on New Host form

Removes merging of NIC's compute attributes when refreshing interfaces
on compute profile or resource selections on the New Host form. Instead,
overwrite NIC attributes from the profile (as it did before 85e82d0) as...

Fixes #14184 - allow filter creation for users with taxonomies

fixes #14179 - don't merge NIC compute attrs in ComputeProfileMerge

When creating a host over the API and specifying interface compute
attributes, the interface attributes were overwritten from the compute
profile. Example request:

{"host":{"interfaces_attributes":{"0":{"primary":"true","compute_attributes":{"model":"e1000"}}}, ...}}...

Fixes #6924 - Additional validations for Setting

refs #9470 - set :limit on column, fix MailNotification initializer

MailNotification.new failed unless it had a Hash argument, hence the
factory had been changed from default behaviour. It also then ignored
all attributes except a given few listed in initialize_with.

fixes #14170 - permit 'zone' parameter for GCE CR creation

Fixes #14154 - fix adrift reports show page