User-Agent:       Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML,
like Gecko) Chrome/69.0.3497.100 Safari/537.36
Build Identifier: 

Without KICAD_SCRIPTING_ACTION_MENU being enabled, many third-party plugins
will not work.

Reproducible: Always

Steps to Reproduce:
1. Open a KiCad project
2. Go to the PCB editor
3. Notice under Tools that there is no entry for external plugins.



Expected Results:  
There should be a menu entry for adding and managing external plug-ins.

Note that this is an experimental feature.