Make the launcher be aware of the window's workspace
Fixed another part of bug #689733 that we were missing, making the launcher to count only the windows in the current workspace when drawing the left "pips".
Also fixed the unity side of the bug #690143 to make the launcher to spread only the windows in the current workspace.
Manual tests included.. Fixes: https://bugs.launchpad.net/bugs/689733, https://bugs.launchpad.net/bugs/690143. Appoved by .