Dragging to scroll clears selection

[m-sasha]

On iOS (or other platforms with touch), the current selection is cleared on touch-up in SelectionContainer after dragging to scroll.

Affected platforms

• iOS
• (probably) Web when used with touch.

Versions

• Compose Multiplatform version: 1.6.11

To Reproduce

1. Run the mpp demo on iOS.
2. In the SelectionContainer demo, in the scrollable text, select some text
3. Drag the scrollable. Note that on touch-up, the selection is cleared.

Expected behavior
Selection should not be cleared.

Screenshots
https://github.com/JetBrains/compose-multiplatform/assets/5230206/e41a45cc-0f42-480a-8420-5fb2230b99b0

Additional context
The selection is cleared by SelectionManager.Modifier.onClearSelectionRequested, because the scroll is not recognized as a drag, so basically it thinks it was a click (because the pointer didn't move relative to the element).

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.