When using multiple monitors, each monitor has a separate workspace.
Default behavior remains the same. An --allinactive/-a flag is added.
When this flag is used, all inactive windows on all workspaces will
become transparent upon focus change.
Transparency gets reset when the script is terminated.
Added command line option to set transparency strength without changing
the script.
Added support for multiple displays.
Sway has ability to apply transparency to arbitrary windows. This script
wires up this functional to one of popular use-cases from
i3+<compositor_name>.
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>
