KDE: how to disable alt-drag move for a specific application/window?

Whenever I am in a Windows guest in Virtualbox and want to use the MS-Office Alt-Drag to resize a textbox in PPT, etc, KDE intercepts it and moves the entire Virtualbox window itself.

I tried going through the Window/Application specific settings on the KDE window but got lost - does anyone know how to disable this for a specific window?

eg. more action->special application settings->Appearance & Fixes->Ignore global shortcuts