Add mouse wheel event to SysMgrEvent

Based on a patch by Teppo Pennanen <teppo.pennanen@palm.com>

Open-webOS-DCO-1.0-Signed-off-by: Teppo Pennanen <teppo.pennanen@palm.com>
Open-webOS-DCO-1.0-Signed-off-by: Jose Dapena Paz <jose.dapena@palm.com>

Change-Id: I5f1ff5028fbd7c2a22a9dce496882bec1334613a
Add mouse hover event to SysMgrEvent

Open-webOS-DCO-1.0-Signed-off-by: Jose Dapena Paz <jose.dapena@palm.com>

Change-Id: I420c1740a7dc33f351e75920a5b150a948ecb731