Merge pull request #2030 from Consolatis/wip/cosmic_workspaces

Initial implementation of cosmic-workspace-unstable-v1

diff --cc include/labwc.h
Simple merge

diff --cc src/action.c
Simple merge

diff --cc src/desktop.c
Simple merge

diff --cc src/meson.build
Simple merge

diff --cc src/output.c
Simple merge

diff --cc src/view.c
Simple merge

diff --cc src/xdg.c
Simple merge

diff --cc src/xwayland.c
Simple merge