Make "Fill goal" available before closing curly bracket

[marat-rkh]

In this example, the caret is placed like this: {?(foldr-monoid<caret>)}. As you can see, there is no "Fill goal" in the context menu. To invoke it, I need to place the caret at the ? symbol. Jumping back like that is inconvenient. It would be much better to make "Fill goal" available at {?(foldr-monoid<caret>)} or at {?(foldr-monoid)<caret>}.