[BUG] Using the Box Select tool to select an area that is partially off the canvas produces a selection overlay that does not include off-canvas pixels

[jbunke]

Bug description

Using the Box Select tool to select an area that is partially off the canvas produces a selection overlay that does not include off-canvas pixels.

Expected behaviour

• All selected pixels should be included in the overlay
• Transform nodes should match the bounds of the selection

Tasks

• [x] Include in changelog for next release