JavaFX tunable in idea.properties?

Hi all - 

I'm using IDEA on FreeBSD 13. The bundled Markdown plugin doesn't provide a preview; e.g. "There are no available preview providers." I'm using OpenJDK11, as there are currently some problems with using the JetBrains' runtime (see https://youtrack.jetbrains.com/issue/IDEA-277106).

There is an OS package for OpenJFX that installs to `/usr/local/openjfx14`, and similarly to how I handle the filewatcher, I was curious: is there a property I could add to my idea.properties file that would expose the system OpenJFX to IDEA?
E.g.:
```
# add fsnotifier
idea.filewatcher.executable.path=/usr/local/intellij/bin/fsnotifier

# add openjfx
idea.javafx.executable.path=/usr/local/openjfx14/lib/javafx.web.jar
```
I'm grasping at straws: the deprecation of the Markdown Navigator plugin has left me with significant gap in terms of Markdown editing (and previewing).
Thanks in advance for any suggestions!
Best,
Bridger