fix: apps would not quit properly sometimes (regression from 10b2c71)

src/logic/Applications.swift

@@ -49,13 +49,14 @@ class Applications {
     static func removeRunningApplications(_ runningApps: [NSRunningApplication]) {
         var windowsOnTheLeftOfFocusedWindow = 0
         for runningApp in runningApps {
-            Applications.list.removeAll(where: { $0.pid == runningApp.processIdentifier })
+            // comparing pid here can fail here, as it can be already nil; we use isEqual here to avoid the issue
+            Applications.list.removeAll(where: { $0.runningApplication.isEqual(runningApp) })
             Windows.list.enumerated().forEach { (index, window) in
-                if window.application.pid == runningApp.processIdentifier && index < Windows.focusedWindowIndex {
+                if window.application.runningApplication.isEqual(runningApp) && index < Windows.focusedWindowIndex {
                     windowsOnTheLeftOfFocusedWindow += 1
                 }
             }
-            Windows.list.removeAll(where: { $0.application.pid == runningApp.processIdentifier })
+            Windows.list.removeAll(where: { $0.application.runningApplication.isEqual(runningApp) })
         }
         guard Windows.list.count > 0 else { App.app.hideUi(); return }
         if windowsOnTheLeftOfFocusedWindow > 0 {