feature: Ability to manually control NotificationDropdown open/closed state

[duckwaffle]

Problem / Motivation

There doesn't seem to be any mechanism to open/close the NotificationDropdown control without simulating a click event on the parent element in the dom. It would be incredible if it were possible to programmatically open/close the NotificationDropdown control.

Proposed solution

Expose a boolean? property named isOpen or something along those lines, which is monitored by NotificationDropdown to call setOpen at

react-activity-feed/src/components/NotificationDropdown.tsx

Line 45 in abc03aa

const [open, setOpen] = useState(false);