fix(wm): update focused idx on cross-monitor moves

This commit ensures that in situations where the last container on a
monitor is moved to an adjacent monitor, the focused container index of
the origin monitor will be appropriately decremented.

komorebi/src/window_manager.rs

@@ -1366,6 +1366,8 @@ impl WindowManager {
                             anyhow!("could not remove container at given origin index")
                         })?;
 
+                    self.focused_workspace_mut()?.focus_previous_container();
+
                     // focus the target monitor
                     self.focus_monitor(target_monitor_idx)?;
 

komorebi/src/workspace.rs

@@ -1376,7 +1376,7 @@ impl Workspace {
         vec
     }
 
-    fn focus_previous_container(&mut self) {
+    pub fn focus_previous_container(&mut self) {
         let focused_idx = self.focused_container_idx();
 
         if focused_idx != 0 {