implement a client menu to allow changing the decktop for a client
add desktop withing tree
bind Left and right key to navigate throught all desktop
fixes and implementation of EWMH for multiple desktop
fix grab on other desktop than the desktop 0
fix grab/bind of floating window
fix issue with client_menu that doesn't selected the proper client
prepare show/hide support
improve desktop switch
improve handle of floating window desktop
improve multiple desktop support
add mossing src/renderable_empty.hxx
first issue that cause client_not_managed to be hiden and remove clients cache list
remove _all_children_cache
remove _current_desktop_children_cache
remove _visible_children_cache
remove _global_default_pop and cleanup default_pop management
merge the implementation of multiple desktop support