feat(notification): Add undoable notification, close #318 (#338)

* feat(notification): Add undoable notification

* feat(notification): Add undoable notification

* feat(notification): Use uhk-header to the notification

* half ready solution

* - fix: "Keymap has been deleted" is displayed for macros.
- When a keymap/macro deletion gets undone, please set the route of the restored keymap/macro.
- When the user switches to another route, please make the undo notification disappear.

* fix(keymap): Store prev user configuration in the application reducer

Store the previous state in application reducer, because refactoring the
user-config reducer is not easy

* feat(keymap): Fix review request

web/src/app.module.ts

@@ -87,6 +87,7 @@ import { reducer } from './shared/store/reducers/index';
 import { LogService } from './shared/services/logger.service';
 import { AutoUpdateSettings } from './shared/components/auto-update-settings/auto-update-settings';
 import { angularNotifierConfig } from './shared/models/angular-notifier-config';
+import { UndoableNotifierComponent } from './shared/components/undoable-notifier';
 import { UhkHeader } from './shared/components/uhk-header/uhk-header';
 
 @NgModule({
@@ -141,6 +142,7 @@ import { UhkHeader } from './shared/components/uhk-header/uhk-header';
         TooltipDirective,
         SafeStylePipe,
         AutoUpdateSettings,
+        UndoableNotifierComponent,
         UhkHeader
     ],
     imports: [