iOS Widget dark/light background

[zamboni]

The medium-grey widget backgrounds seem to have been chosen so they work in both dark and light modes.

Unfortunately, this looks terrible next to widgets from other apps, which use a consistent dark-grey background in dark mode and white background in light mode. So setting up a “dashboard” using widgets from multiple apps always looks cheap and hacky when Windy is added.

Please update the widgets to use different backgrounds according to dark or light mode.