This patch updates the custom property editor tab documentation
from the Connections view. It also includes new images to
present the newly design custom property in the document.
Images were added in "webp" format.
Fixes: QDS-10816
Change-Id: I37a1471477f0f58138819511aa18abe4d6b54e2f
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
