[QScintilla] Patch for scroll width and scroll width tracking messages

[Phil Thompson]

On 12 Nov 2017, at 1:49 pm, Manuel Gómez <mgrojo at gmail.com> wrote:
> 
> Hi,
> 
> The attached patch adds methods for the following Scintilla messages:
> 
> SCI_SETSCROLLWIDTH
> SCI_GETSCROLLWIDTH
> SCI_SETSCROLLWIDTHTRACKING
> SCI_GETSCROLLWIDTHTRACKING
> 
> The patch has been developed for the DB Browser for SQLite and works well for avoiding the unnecessary display of the horizontal scroll bar.
> 
> See this for explanation:
> 
> https://github.com/jacobslusser/ScintillaNET/issues/216

Applied buy I've changed it to follow my current standard for this sort of thing, ie. no virtuals , no slots and no 'get' prefix.

Thanks,
Phil