Scrollbar fix #612

[CriusMacOldenly]

These changes fix issue #612 . They do introduce a flicker when scrolling up at this time.

Brief overview of PR changes/additions

Added 2 lines each to set the value of the scrollbar on bufferScrollDown() and bufferScrollUp().

Motivation for adding to Mudlet

I was bothered by the fact that when I used the mouse wheel to scroll up or down that the scrollbar didn't move. If I then clicked on the scrollbar, I was moved to a place as if I didn't use the mouse wheel at all. This also affects pg up and pg down not affecting the scrollbar.

Other info (issues closed, discussion etc)

This closes issue #612 , however, it causes a flicker of the split pane due to issue #3054 .

[add-deployment-links]

Hey there! Thanks for helping Mudlet improve. 🌟

Test versions

You can directly test the changes here:

• linux: https://make.mudlet.org/snapshots/1f2d7d/Mudlet-4.1.2-testing-PR3198-79a1854-linux-x64.AppImage.tar
• osx: https://make.mudlet.org/snapshots/28a875/Mudlet-4.1.2-testing-PR3198-79a1854.dmg
• windows: https://make.mudlet.org/snapshots/2833e6/Mudlet-4.1.2-testing-PR3198-79a1854e-windows.zip

No need to install anything - just unzip and run.
Let us know if it works well, and if it doesn't, please give details.

[vadi2]

@CriusMacOldenly is this something you're interested in seeing through?

[CriusMacOldenly]

As stated in the description:
This closes issue #612 , however, it causes a flicker of the split pane due to issue #3054 .
Since you did not find the scrollbar flicker acceptable, and I was unable to quickly fix issue #3054 , I permanently put this on hold (until someone could figure out #3054 ). Do you want this closed?

[vadi2]

Yes, until #3054 is addressed, it's best to do so.