Reintroduce a needsRedraw flag that can be set to true to update the quad layer if you use a canvas as src

[vincentfretin]

Description:

If you use a canvas as src, and later update the canvas, the layer is not updated. I propose to reintroduce a needsRedraw flag on the component that can be set with this.el.components.layer.needsRedraw = true from another component that updated the canvas.

Changes proposed:

• Reintroduce a needsRedraw flag that can be set to true to update the quad layer if you use a canvas as src

[vincentfretin]

I will need to rebase this one after #5722 is merged, I'll have a conflict.

[dmarcos]

Thank you!