Dynamic Modals (#417)

* Move backdrop and click handler to modal service since they should not be used in web

* Add support for opening modals using ViewContainerRef

node/src/cli/services/cliPlatformUtils.service.ts

@@ -114,11 +114,6 @@ export class CliPlatformUtilsService implements PlatformUtilsService {
         throw new Error('Not implemented.');
     }
 
-    showPasswordDialog(title: string, body: string, passwordValidation: (value: string) => Promise<boolean>):
-        Promise<boolean> {
-        throw new Error('Not implemented.');
-    }
-
     isDev(): boolean {
         return process.env.BWCLI_ENV === 'development';
     }