v0.2.0a144

✨ Features

• add config item show_command.use_letters
• allow setting nested config items whose root does not exist

🐛 Bug Fixes

• format of Jobscript.task_elements
• remove unrequired show config item
• update show command iconography to be more accessible; fix #560

👷 Build changes

• merge develop
• update binary download links file [skip ci]