Load LinkAttributeType roots and factor out serialization for edits
MBS-7750: Mark videos "(video)" instead of "(true)"

around$html tried to pass the "video" string to the html method, where
it was overwritten by the boolean value from the entity itself, via
extend. Use a different name (videoString) instead.
Show a warning if the CAA appears to be down
MBS-7875: Attributes aren't cleared when relationship target type is changed
Make reordering mediums an auto-edit (MBS-7895)
Merge remote-tracking branch 'nikki-bitbucket/more-auto-edits' into beta

* nikki-bitbucket/more-auto-edits:
  Make reordering mediums an auto-edit (MBS-7895)
Merge remote-tracking branch 'nikki-bitbucket/caa-check-status' into beta

* nikki-bitbucket/caa-check-status:
  Show a warning if the CAA appears to be down
Merge remote-tracking branch 'bitmap/mbs-7875' into beta

* bitmap/mbs-7875:
  MBS-7875: Attributes aren't cleared when relationship target type is changed
Merge remote-tracking branch 'bitmap/lat-edit-serialization' into beta

* bitmap/lat-edit-serialization:
  Load LinkAttributeType roots and factor out serialization for edits
Merge remote-tracking branch 'chirlu/mbs-7750' into beta

* chirlu/mbs-7750:
  MBS-7750: Mark videos "(video)" instead of "(true)"