Open member dialog

This idea is inspired by the sublime text open anything dialog.

Sometimes I need to open a particular method or a field in a type. Currently, in order to do so, I first need to use the open type dialog and then do CMD+O to navigate to the method.

It would be nice if I could do that all in one step. For example, using the open type dialog, start typing a type name, and then press '#'. Any chars after that would be considered a field or method name (or perhaps inner type). And the dialog would start showing matching members and filter them out as you type.

Things are more complicated if multiple types are matching in the dialog. We would need to search in each of the types for matching members.

Also, we could consider handling the case where there is only a '#' and no type name. This would match all member declarations in any type that match.