Allow horizonal scrolling, when mouse hovers over the horizontal scroll bar
|Reported by:||mmadia||Owned by:||leavengood|
|Has a Patch:||no||Platform:||All|
WebPositive does not scroll horizontally when the cursor is above the horizontal scroll bar.
This feature was implemented in hrev44257. However it doesn't work in Web+
9f5864a: Handle the scroll wheel changing over scrollbars. * Extract the scrollbar change based on the mouse wheel delta into a protected method of BView. * Call that method from BScrollBar's MessageReceived. With this change it is now a bit easier to scroll horizontally around the system by putting the mouse cursor over a horizontal scrollbar and using the wheel.