feat(viewer mode): add modes to control the available actions in the viewer

[Justineantoine]

Changes:

• Add RCAViewerMode to control the RCA handled events
• Add EEGAnnotatorMode:
  • Annotate : activated only when new annotation or existing one belonging to the user
  • Review: activated only when annotation "in review" and not belonging to the user
  • Done: activated when the EEG fileset is done
  • Read-only: activated when none of the above matches
  • Undefined : default status when no EEG fileset is selected (avoid UI shifting when loading data to the viewer)
• Add Action button depending on the mode:
  • Annotate : save, submit, delete
  • Review: approve, reject
  • Done, Read only: lock with read only text
  • Undefined : empty placeholder

[finetjul]

• Rename "EEG fileset" text into "EEG"
• Rename "Annotations file" text into "Annotations"
• It's too bad that the "Actions" are not more part of "Annotations". Can you great a unique Annotations group around the Select and the list of buttons ?
• a "Submit for review" should probably "save" the annotation first.

[Justineantoine]

• Rename "EEG fileset" text into "EEG"

👍

• Rename "Annotations file" text into "Annotations"

👍

• It's too bad that the "Actions" are not more part of "Annotations". Can you great a unique Annotations group around the Select and the list of buttons ?

Is it better ? (maybe removing the dividers between the actions)

• a "Submit for review" should probably "save" the annotation first.

done in the latest PR :)

[finetjul]

LGTM