Show classic scroll bar at rest in History and Messages

[PhilZ-cwm6]

Note: this is an optional mod, just for the info/tweak

• show the classic scroll bar at rest because:
  • fastScroll bar is too large if kept always on
  • fastScroll bar has large zone at left of the bar area where touch will fast scroll instead of select the list view
  • fastScroll bar will always fade completely, unless always kept active (will be shown even if no scroll view is present)
  • fastScroll bar fading timeout cannot be changed from the 1500 msec default
  • by the presence of the classic scroll bar, we know the view is scrollable
• on any MOVE action, enable the fastScroll bar for a fastScrollBarDisableTimeout duration after last touch event
• do not fade out the fastScroll bar while list is scrolling (during a fast long scroll while finger is lifted up)
• [fastScrollBarDisableTimeout]:
  • set timer to 1500 to have the classic scroll bar appear immeadiately when fast scrollbar fades
  • default is 3000 msec: lets the fastScroll bar active after it faded out. This makes it possible to fast scroll on touch between touch events