Alert system

[stappan]

Design description
for the UI:

• a new collapsible section called Statement Alerts is added to the Distillation view, below Statement Details
• Each Alert Type is configured in the Admin area of Composer, & a button/chip sized to display the full text of the label is provided.
• chip label is not truncated. it is the full length of the alert name.
• once clicked, the button/chip creates a text box in the Statement Alert section.
• the chip label changes from the unadded state ("+ Alert name") to added state ("Alert name")
• focus is moved to the text box, so the curator can immediately begin typing.
• text is automatically saved when clicking away from the text box. All alerts of the same type are concatenated within the single text box.
• hyperlinks should be clickable in the text box. [possible?]
• For chips in the added state, clicking them moves focus for the user to that Alert's text box.

This mimics the operation and feel for adding a Knowledge Statement to a Sentence (e.g., see light grey box for "Add a knowledge statement" here

for the Admin interface:
A new datatable is created, called Alerts

• to add alert, select green Add Alert button; provide name and URI
• when present, each alert is exported with the knowledge statement.

This behaves just like Species data table.