Fix electron session api for service removal

Use promises instead of callbacks

app/view/main/MainController.js

@@ -157,18 +157,19 @@ Ext.define('Hamsket.view.main.MainController', {
 		function clearData(webview, tab, resolve) {
 			webview.getWebContents().clearHistory();
 			webview.getWebContents().session.flushStorageData();
-			webview.getWebContents().session.clearCache(function () {
+			webview.getWebContents().session.clearCache()
-				webview.getWebContents().session.clearStorageData(function () {
+			.then(webview.getWebContents().session.clearStorageData)
-					webview.getWebContents().session.cookies.flushStore(function() {
+			.then(webview.getWebContents().session.cookies.flushStore)
+			.then(function() {
 				// Remove record from localStorage
 				Ext.getStore('Services').remove(rec);
 				// Close tab
 				tab.close();
 				if ( Ext.isFunction(resolve) ) resolve();
 				// Close waiting message
-						if ( total === actual ) Ext.Msg.hide();
+				if ( total === actual ) {
-					});
+					Ext.Msg.hide();
-				});
+				}
 			});
 		}
 	}