Created attachment 68899 [details]
attachment image showing 3 steps to reproduce bug

Problem description: 

Steps to reproduce:

1. ....Click and drag horizontal displacement bar or keep pressed mouse button from any place of the UI

2. ....Keep left mouse button pressed (drag) while the arrow moves to zoom slider area

3. ....When mouse button is released over zoom slider area, zoom jump to point where click was released

Current behavior:Zoom zoom slider jump to a point of zoom slider area where mouse click was released coming from any other UI place

Expected behavior:Zoom slider must keep zoom and only jump when user click over zoom slider area, not when user click and drag from any other UI place (like MS Office), this is specialy annoying in calc when user made click and drag horizontal displacement bar and then release the click over zoom slider, the zoom jump to 300% by example.

Platform (if different from the browser): Windows and Linux, LibreOffice 3.6 and maybe happen in other platforms and version
              
Browser: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0; OfficeLiveConnector.1.4; OfficeLivePatch.1.3; .NET4.0C)