Draft: Gnome 44 geometry fixes

With upstream mutter changes at times, as at the beginning of Gnome 44, the desktop window could not be placed at 0,0 because of mutter constraints and was pushed down by the width of the top bar. This regression to the API has since been reverted.

Adapt, changing the code in desktopGrid.js to move and resize the desktop window with any changes to workarea to resize and move to workarea instead of at 0,0 to take the entire screen. Also changes in the Manager to adapt.

Maintain as draft in case of future changes.