Support for devices with mouse and touch at once

It seem that drag designed only support touch or mouse events depending on device type. But there are also device with simultaneous support of both event times (for example windows computers with touch screen)

No file, test, or entry point is named. Start by locating the drag event handling and reproduce the issue on a device supporting both mouse and touch input. Done means drag support works for devices that expose both event types.

Written by the indexing model from the issue text.