Reveals and selects node in the file navigator to which given widget is related.
Does nothing if given widget undefined or doesn't have related resource.
Parameters
widget: undefined | Widget
widget file resource of which should be revealed and selected
Returns Promise<boolean>
Protected withOpenEditorsWidget
withOpenEditorsWidget<T>(widget: Widget, cb: ((navigator: OpenEditorsWidget) => T)): false | T
Collapse file navigator nodes and set focus on first visible node