* Expose `DefaultApplicationMenu`.
Add `FindByLabel` and `ItemAt` for finding menu items in a menu
* Add `Menu.RemoveMenuItem()`, `MneuItem.GetAccelerator()` and `MenuItem.RemoveAccelerator()`
* Remove `Update`
* Iterate when removing menu items
* Add `GetSubmenu()`
This update allows the application shutdown to be cancelled. It implements the shouldQuit function, which can prevent the application from quitting if it returns false. Additional checks have been added to ensure cleanup and quit processes are performed only if required. The darwin delegate and linux and windows applications were modified to include this new functionality.
This commit adds a robust teardown process for windows on application shutdown. It introduces a field to track the destruction state of each window and checks such before performing window operations. Also, it enhances the destroy functions within application for thorough clean up. Finally, redundant event handlers related to application termination were removed while fixing file generating challenge in go tasks.
