Polish Widgets Foundation

[ovitrif]

Found a couple of UI nits worth polishing in another PR:

Part 1

1. Bg Color Issue

Screen in AppWidgetConfigActivity doesn't have same BG color as the bitkit app, apparently.

While that's not the main issue, it leads to these visible differences in bg between system bars and app bg:

Widgets Activity	App Activity

Most likely the fix is to enable edge to edge like we do in MainActivity.kt#L89

enableAppEdgeToEdge()
// setContent {
// …

2. New Select Option UI Control Jump

There's a slightly visible jump on UI when changing widget options using the new select component, visible on tap:

uiglitch.mp4

Originally posted by @ovitrif in #895 (review)

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Part 2

I've approved all individual stacked PRs. I think it looks good functionally. Also e2e tests updated to cover in app redesigned widgets.

There are some outstanding items that I think would be good to address before releasing this feature:

• behavior described here: feat: headlines widget v61 + OS widget #919 (comment) (seems to concern all OS widgets)
• if possible consider ordering suggestion of OS widgets on add screen (IMHO price, blocks, weather could be on top if possible)
  • NOT POSSIBLE
• in app small widget support... either support it in app view or remove small preview for now. Otherwise it may be a bit confusing as why only wide version is supported despite saving the small one.

Originally posted by @piotr-iohk in #895 (comment)

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Part 3

• Open app when tapping widgets without settings (Calculator, Facts)
• Add support for Android OS Widget Settings menu and drag&drop area

  Menu	Drag&Drop Area

• Replace first preview in WidgetSizeCarousel to show the wide view by default
  • also refactor to support passing startingSlide from outside (as fn arg) and update each widget composable previews to include a preview screen for each slide and make sure all widget composable previews are annotated with @Preview(showSystemUi = true) instead of passing showBackground=true.