[FEATURE] Add focus support for TextView

Are there any ways to focus a `TextView` element?
My use case is that I want to create a select list using `LinearLayout` (vertical) and `TextView`. This results in an error because `TextView` uses the default implementation of `take_focus` from `View`. Using `SelectView` is an alternative, but it restricts the `label` to be within one single row.
I wonder why `focus` is not supported for `TextView`. Are there any difficulties involved supporting this feature that I may miss?