fix(wm): prevent floating focus change event infinite loops

This commit stops the `FocusChange` event from focusing a floating
window when it is the one emitting said `FocusChange` event, since it's
not needed and is the cause of some flicker bugs reported!

If that floating window was the one emitting the `FocusChange` event
then it means it is already the foreground window, and there is no
reason for us to focus the window again (since that will create an
infinite loop of events).

When the window emitting this event is not floating we don't try to
focus the window, we simply set the focus index for the container of
that window and the focused index for the window of that container.

Except in one case, which is if the workspace has a monocle container,
then it does focus a window, it focuses the monocle window to make sure
the monocle keeps showing in front of everything and doesn't let
anything come in front of it.

Author: alex-ds13

komorebi/src/process_event.rs

@@ -285,8 +285,7 @@ impl WindowManager {
                         workspace.set_layer(WorkspaceLayer::Tiling);
                     }
                     Some(idx) => {
-                        if let Some(window) = workspace.floating_windows().get(idx) {
-                            window.focus(false)?;
+                        if let Some(_window) = workspace.floating_windows().get(idx) {
                             workspace.set_layer(WorkspaceLayer::Floating);
                         }
                     }