Every monitor has workspaces of its own, which KWin's per-output desktops show
independently, so a second monitor is mostly the window manager's business:
which monitor has the focus, and how a window gets from one to the other.
At the edge of a monitor, focus and move now cross to the monitor on that side,
where they used to fail with "there is no container in this direction": the
focus lands on the container nearest the monitor it came from, and a move swaps
with the container at that edge (cross-monitor-move-behaviour insert puts it in
among the containers there, no-op keeps it). A window that opens or gets the
focus on a monitor that is not the focused one focuses that monitor, which also
makes the scrolling test of a strip next to another monitor guard real code.
The monitor commands come with it: focusing a monitor by index, in order or
under the pointer, a workspace of another monitor, moving and sending the
focused window to another monitor, to a workspace of it or to a named workspace
(in the window manager these are moves between monitors, so they were left out
of the workspace commands), moving and swapping workspaces between monitors, and
a display index preference that keeps a monitor at the index the user gives it.
eager-focus focuses the first window of an executable on any workspace of any
monitor; its window is found in a container or among the floating windows, the
two places a window can be until stacks, monocle and maximize exist.
LGUG2Z
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