Annotation Tool Labels: Create, Edit, Delete

[PaulHax]

UI

Create an "Add Label" chip button at end of LabelControls. Clicking "Add Label" pops "Edit Label" modal.

Edit Label modal form:

• Label name
• Properties (color, fill color, etc)
• Delete button

Add "Edit Label" icon button to each LabelControl chip which pops modal.

After label is edited, existing annotations with label have their properties updated. Annotations with a deleted label get their label set to empty string.

Change label for existing annotation is for another issue.

Implementation

Serialization: Each annotation tool saves all their labels + properties, including labels from the config.json. On deserialization, session manifest.json labels are merged with config.json labels, with manifest.json labels taking precedence.