Emit when the current editor is changed.
The active editor. If there is an active editor (one that has focus), active and current are the same.
The most recently activated editor (which might not have the focus anymore, hence it is not active).
If no editor has focus, e.g. when a context menu is shown, the active editor is undefined, but current might be the editor that was active before the menu popped up.
Opens an editor to the side of the current editor. Defaults to opening to the right.
To modify direction, pass options with {widgetOptions: {mode: ...}}
Emit when the active editor is changed.