Added two buttons to add and remove files.
Files are stored in project inside a directory named "static",
itself located in svghmi CTN instance files. Exemple :
exemples/svghmi_csv_json_img_table/svghmi_0@svghmi/static/
Files are transfered as "extra_files", but with a prefix
added to their name to avoid conflics.
#!/bin/bash
# Run python example throug command line, and check usual output
coproc setsid $BEREMIZPYTHONPATH $BEREMIZPATH/Beremiz_cli.py -k --project-home $BEREMIZPATH/tests/projects/modbus_test_tcp build transfer run;