Support persisting keepMeSignedIn toggled with keyboard (#747)

browser.js

@@ -519,7 +519,7 @@ window.addEventListener('load', () => {
 	if (location.pathname.startsWith('/login')) {
 		const keepMeSignedInCheckbox = document.querySelector('#u_0_0');
 		keepMeSignedInCheckbox.checked = config.get('keepMeSignedIn');
-		keepMeSignedInCheckbox.addEventListener('click', () => {
+		keepMeSignedInCheckbox.addEventListener('change', () => {
 			config.set('keepMeSignedIn', !config.get('keepMeSignedIn'));
 		});
 	}