Code actions modifying other files don't update current file diagnostics

[fbricon]

Following on #262.

Not sure if it's related to the SharedASTProvider, but if you have

public @interface Annot {
}

and

public class Bar {
	@Annot(name="foo")
	public void something{}
}

Quick fix on name, to create the missing name attribute in Annot, will properly add the missing name attribute, but, in vscode, @Annot(name="foo") is still shown as having an error, so hitting the quick fix a second time will add a 2nd name member:

public @interface Annot {
	String name();

	String name();
}

Same issue happens when creating a missing method in another class. If I leave the 1st class that was showing the error and go back, the error doesn't show up, even though the new method was not saved in the 2nd class. Seems like diagnostic reporting is not properly updated