Admin: "New chart" button on chart editor page doesn't work as expected

[sophiamersmann]

Description

Clicking the "New chart" button on a chart editor page doesn't work as expected. It should open a new editor with a blank slate, but instead, the configuration for the current chart is carried over. Clicking the "New chart" button on the index page works fine.

Steps to reproduce

1. Go to the admin
2. Edit a chart
3. Click on "New chart"

Screenshots

Additional context

This is what's supposed to fix it, but it doesn't work anymore:

owid-grapher/adminSiteClient/ChartEditorPage.tsx

Lines 398 to 402 in 16036f1

	// This funny construction allows the "new chart" link to work by forcing an update
	// even if the props don't change
	UNSAFE_componentWillReceiveProps(): void {
	setTimeout(() => this.refresh(), 0)
	}

#3793 refactors the admin and gets rid of the fix since it doesn't seem to work