[ModernApp|ModernCSApp] translate X gesture in rederer

Pluging in the gesture service to liste for translation X to then
translate the dx surface
[ModernApp|ModernCSApp] Pinch/Zoom tweener

Wired up pinch/zoom gestures into the tweener of the renderer for the
demo
[ModernApp|ModernCSApp] notifications for pinch/zoom

added some demo notifications to know what pinch/zoom is going on
[ModernApp|ModernCSApp] login name alignment

just fix the login name alignment and color for demo