Initial support to Windows Phone ActionSheet, minor fixes on WP Dialogs
Revert "Initial support to Windows Phone ActionSheet, minor fixes on WP Dialogs"

This reverts commit 78e9958135fb35cad62d8443d07ad9c0d8f49b0f.
Revert "Revert "Initial support to Windows Phone ActionSheet, minor fixes on WP Dialogs""

This reverts commit 03f4a57942e031fd4563ba87e7f842d5e03af062.