[#81142624][WIP] Start of UI for uploading images
Fix adhoc toolbar button animations
Merge with master
update standard task gemspec
Duplicating AttachmentUploader for now :(

For some reason when AdhocAttachmentUploader inherits from AttachmentUploader Sidkiq decides to
ignore AdhocAttachmentUploader and invokes AttachmentUploader directly.
Merge remote-tracking branch 'origin/master' into images_in_adhoc_card
[#81142624][WIP] Image upload progress and preview
Update serializers to account for polymorphically associated attachments
Merge remote-tracking branch 'origin/master' into images_in_adhoc_card
change newBlocks default value
add attachment as a test dependency
Add specs for worker
Add bugsnag javascript tag
Add BugSnag keys to defaults
Separate BugSnag API keys
Add release stages to suppress dev and test errors
Move file location
Incorporate with existing error handling
Fix z-indexs

- Manuscript placeholder, control bar and ve toolbar
were in the wrong order
use vanilla ember data to delete uploaded image