Revert "Release 1.5.3"

This reverts commit bfc5ae9b5b087893dbdb4d9007c0df13a18dcb00.
Release 1.5.2
Merge branch '1.5.2.3' into 1.5.x
Merge branch '1.5.2.4' into 1.5.x
AUI-972 Diagram builder connectors jump around the canvas on browser resize and scrolling
AUI-972 - Build