Is your feature request related to a problem? Please describe.
Not really, but sometimes people import an aura with a font they do not have wich causes the font dropdown to stay empty and the weakaura to default to Fritz Quadrata TT (?)

Describe the solution you'd like
I would love to be able to set a default font myself. Outside of any aura.

Describe alternatives you've considered
Messing with the lua to set a different default font.

Additional context
This is to be seen as a qualilty of life improvement and with a low priority.

That is part of #983 covered by #2948 and also the alternative you mentioned is currently already possible here https://github.com/WeakAuras/WeakAuras2/blob/main/WeakAuras/DefaultOptions.lua