The rotate handle should change position depending layer position in canvas

[kmanaseryan]

The rotate handle should change position depending on where a layer is on the canvas, so that it is always accessible, if possible. Currently, if you move a layer e.g. to the upper-right hand corner of the canvas, you can no longer access the rotate handle.

https://github.com/viliusle/miniPaint/issues/286#issuecomment-1033912526