scrollbar sees reduced mouse movement

[Shahbaz Youssefi]

I am not using overlay scrollbar, so just normal scrollbars.

Steps to reproduce the issue:

- Open a program with large scrollable content, where handle is small (for example, a long pdf in evince, or even the sound volume scrollbar of indicater-sound - It doesn't happen with Firefox)
- Take the scrollbar (left mouse press on scrollbar handle)
- **Very slowly** start moving the mouse for a second or two
- Move the mouse normally

Expected behavior: The scrollbar handle moves with the mouse with the same speed

Observed behavior: The scrollbar handle moves with greatly reduced speed compared to the movement of the mouse

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: unity 7.3.1+14.10.20141016-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,grid,mousepoll,compiztoolbox,vpswitch,regex,gnomecompat,imgpng,snap,move,unitymtgrabhandles,resize,session,wall,animation,workarounds,fade,expo,scale,ezoom,unityshell]
CurrentDesktop: Unity
Date: Tue Feb 10 21:40:21 2015
ExecutablePath: /usr/bin/compiz
ProcEnviron:
 PATH=(custom, no user)
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to utopic on 2014-11-01 (100 days ago)

[Adolfo Jayme Barrientos (fitojb)]

This is a GTK+ “feature” which has nothing to do with unity.