Selection doesn't drag vertically when text is too long horizontally

[nooblyf]

Describe the issue

I've noticed this happening only when the text is both vertically and horizontally scrollable

When i select the text and move the mouse up outside the code block the selection should be dragging the selection up? like it does when i move outside horizontally at 00:18

I don't know if i'm explaining this right, here's a screen recording

screen-rec-cm6-selection-drag.mp4

I've tried this in Safari, Chrome and Firefox

Browser and platform

chrome, macOS

Reproduction link

https://codemirror.net/try/?c=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

[marijnh]

Thanks for the report. Attached patch should help.

[nooblyf]

Thanks for the quick fix!