make download_items responsive

[Guocork]

Now, the layout in download_items is responsive.

[joulei]

While this works we can clean up a bit:
It seems that you can actually achieve this by simply changing the width and height property on those elements directly, instead of wrapping them in views.

You can keep:

<Information> {}
<Progress> {}
<Actions> {}

And update those values directly on each element:

Actions = <View> {
 width: Fill, height: Fit
// ...
}