Results 3 issues of e-Mole

After opening the saved project, it is "undefined" for all parameters in the subroutines. ![Blockly-problem-01](https://user-images.githubusercontent.com/13387465/115529686-6565e180-a293-11eb-8af0-b7175557572f.png)

Add ArduinoToSerial block for sending data to MoleGraph multiplatform app (http://www.e-mole.cz/diy/molegraph)

I need to hide certain fields according to the user's choice (on the Event registration form). So I use the [Conditional Fields](https://www.drupal.org/project/conditional_fields) module (last DEV version). Content forms - Page,...