Quick Launch bar, add an option to be fixed and auto-expandable (Win7-like)

ros currently offers

• either a "fixed taskbar", which hides the resize-sliders of the QuickLaunchBar.
• or "unfixed taskbar" which has the sliders to manually adjust the size of the QuickLaunchBar

The request is to have a "third" option, let's call it "fixed but auto-expandable" that basically works like the thing on Windows 7. It should not show the resize-sliders then. But still the Quicklaunch-bar should dynamically grow and shrink when you add something to it, or delete it.
That solves the problem, that the user currently has to always change the resize-sliders position.
Furthermore: the resize-sliders do waste valuable screenspace in the taskbar.
Pretty fiddly atm.

The requested feature is not yet present on 0.4.15-dev-5137-g826bd41