Fix tl mode zoom on macs

[aokcoder]

Problem

• TL mode of zooming is not working on Macs.
• The focusing point is away from where the cursor is.

Fix

• The problem was that we were using canvas.width for the calculation without taking into account the devicePixelRatio of the device.

Signed-off-by: aokcoder 34686857+aokcoder@users.noreply.github.com

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