added onCancelled message

extension/ui/bg/ui-button.js

@@ -59,6 +59,9 @@ singlefile.ui.button = (() => {
 			}
 			onError(sender.tab.id, request.options);
 		}
+		if (request.processCancelled) {
+			onCancelled(sender.tab.id, request.options);
+		}
 	});
 	if (browser.runtime.onMessageExternal) {
 		browser.runtime.onMessageExternal.addListener(async message => {
@@ -119,6 +122,10 @@ singlefile.ui.button = (() => {
 		refresh(tabId, getProperties(tabId, options, browser.i18n.getMessage("buttonErrorBadge"), [229, 4, 12, 255]));
 	}
 
+	function onCancelled(tabId, options) {
+		refresh(tabId, getProperties(tabId, options, "", DEFAULT_COLOR, DEFAULT_TITLE));
+	}
+
 	async function onEnd(tabId, options) {
 		refresh(tabId, getProperties(tabId, options, browser.i18n.getMessage("buttonOKBadge"), [4, 229, 36, 255]));
 	}