I am developing an extension where I am creating a custom VSCode Terminal from the extension, for the delete/kill terminal button (trashcan icon) that appears on every terminal, I want to execute my own function when that trashcan icon is clicked, is there a way to override existing command ? I can't use the onTerminalClose listener as it runs when vscode closes too, which I don't want. If this can't be done is there a way to provide additional UI buttons for a VSCode terminal ?