Default should be impliment for scrollable::Style

Request Feedback
1

I tried to use this code for scrollable:

.style(|_theme: &Theme, _status|  scrollable::Style {
                                         container: todo!(), ..Default::default() })

and got this error:


`the trait `std::default::Default` is not implemented for `iced::widget::scrollable::Style`

So turns out, Default is not implement for the Style for scrollable, which should be implemented, because for a lot of other styles, there are options you don’t want to or need to touch, the same applies to scrollbar styles, so it should be added so you can just set the needed settings for the style of scrollbar and use the default for the rest.

2

I’ve just noticed that for a few (more complex?) widgets, the default style function exists as a free function in the relevant module. Does this solve your problem: