Update Theia, CLI and LS (#610)

* Update Theia to 1.19.0

* update CLI to 0.20.0-rc3

* Add language selector to settings

* updated language server and vscode-arduino-tools

* update Language Server flags

* get cli port from config

* force native menu on windows

* pinned Language Server to rc2

* fix search icon

* update CLI version

arduino-ide-extension/src/browser/contributions/new-sketch.ts

@@ -1,4 +1,4 @@
-import { nls } from '@theia/core/lib/browser/nls';
+import { nls } from '@theia/core/lib/common';
 import { injectable } from 'inversify';
 import { ArduinoMenus } from '../menu/arduino-menus';
 import { ArduinoToolbar } from '../toolbar/arduino-toolbar';