Add global Ctrl/Cmd+W handler to close active window/dialog

Before this change, developer needed to add such a handler to each window/dialog separately

qt/aqt/__init__.py

@@ -407,6 +407,22 @@ class AnkiApp(QApplication):
     def eventFilter(self, src: Any, evt: QEvent | None) -> bool:
         assert evt is not None
 
+        # Handle Close shortcut here because modal dialogs disable main-window shortcuts
+        if (is_mac or is_lin) and evt.type() == QEvent.Type.KeyPress:
+            key_event = cast(QKeyEvent, evt)
+            if not key_event.isAutoRepeat():
+                mods = cast(int, key_event.modifiers().value)
+                seq = QKeySequence(mods | key_event.key())
+                if any(
+                    seq == binding
+                    for binding in QKeySequence.keyBindings(
+                        QKeySequence.StandardKey.Close
+                    )
+                ):
+                    if mw is not None:
+                        mw._close_active_window()
+                    return True
+
         pointer_classes = (
             QPushButton,
             QCheckBox,

qt/aqt/main.py

@@ -1184,6 +1184,22 @@ title="{}" {}>{}</button>""".format(
         self.applyShortcuts(globalShortcuts)
         self.stateShortcuts: list[QShortcut] = []
 
+    def _close_active_window(self) -> None:
+        window = (
+            QApplication.activeModalWidget()
+            or current_window()
+            or self.app.activeWindow()
+        )
+        if not window or window is self:
+            return
+        if window is getattr(self, "profileDiag", None):
+            # Do not allow closing of ProfileManager
+            return
+        if isinstance(window, QDialog):
+            window.reject()
+        else:
+            window.close()
+
     def _normalize_shortcuts(
         self, shortcuts: Sequence[tuple[str, Callable]]
     ) -> Sequence[tuple[QKeySequence, Callable]]: