feat(notification): display app errors, close #319 (#333)

* refactor(log): Refactor logging service

Removed the InjectionToken and changed LogService as default logger.
Finally ElectronLogService implements LogService directly.

* refactor: Optimize imports

* fix(app-update): Add missing rxjs imports

* style: Remove extra line

* refactor(store): Move app.actions.ts to shared module

* feat(notification): Add notification panel

Add angular-notifier to the app and created the ShowNotificationAction
to manage notifications

* style(notification): Fix tslint suggestion

* fix(notification): Add missing rxjs imports

shared/src/models/angular-notifier-config.ts

@@ -0,0 +1,44 @@
+import { NotifierOptions } from 'angular-notifier';
+
+export const angularNotifierConfig: NotifierOptions = {
+    position: {
+
+        horizontal: {
+
+            /**
+             * Defines the horizontal position on the screen
+             * @type {'left' | 'middle' | 'right'}
+             */
+            position: 'right',
+
+            /**
+             * Defines the horizontal distance to the screen edge (in px)
+             * @type {number}
+             */
+            distance: 12
+
+        },
+
+        vertical: {
+
+            /**
+             * Defines the vertical position on the screen
+             * @type {'top' | 'bottom'}
+             */
+            position: 'top',
+
+            /**
+             * Defines the vertical distance to the screen edge (in px)
+             * @type {number}
+             */
+            distance: 12,
+
+            /**
+             * Defines the vertical gap, existing between multiple notifications (in px)
+             * @type {number}
+             */
+            gap: 10
+
+        }
+    }
+};