* 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
Like for the examples, we show all libraries if no board is selected,
or the platform for the selected board is not installed.
Otherwise, we show the libs for the current board.
Signed-off-by: Akos Kitta <kittaakos@typefox.io>