Remove some dead order admin javascript

The element referred to was removed in 72e5d47

Fixes #3872
Bump to allow any highline version in the > 1.6.18 & < 1.7.x range

Fixes #3870
Remove order.rb.swo file
Fix issue where Product#set_property was causing an undefined method with spree_i18n

Fixes spree/spree_i18n#301
Select2 fixes to center the search box

Fixes #3854
Fixes #3863
Add process method to BogusSimple gateway to be able to process payments.

Fixes issue where hitting "process" on payments screen breaks with
BogusSimple gateway.

Fixes #3824
Order state changes are now tracked after all transitions, exactly like shipments and payment state transitions

Fixes #3850
checkout/registration view should live in auth component, not frontend
Bump activemerchant to 1.40.0

Likely fix for spree/spree_gateway#105
Fixed jquery.payment formatting not applying to more than one set of gateway fields on the payments page
[frontend] only draw index + show routes for products
[frontend] Remove orders/destroy route
Dismiss
Remove UserBanners which don't appear to be used anymore
[backend] Separate void + creation tests in payments spec
Add missing 'New Country' translation