Close the app on press ESC.

Signed-off-by: aleister <aleister@develer.com>
Added the curtain effect (taken from the Qt5 cinematic experience demo) to
the Particles/GraphicalEffects slide.

Signed-off-by: aleister <aleister@develer.com>
Workaround to fix an alignment problem when using an anchorchanges.

Signed-off-by: aleister <aleister@develer.com>
small modification to the slides

Signed-off-by: aleister <aleister@develer.com>
Added the Emboss effect to the video demo.

Signed-off-by: aleister <aleister@develer.com>