Hi,
I guess the ManaPlus developers could provide an patch for the original client - maybe they already have.
The spell shortcuts are indeed very linked to the tA server gameplay.
The only ManaPlus developer is 4144 who has done an incredible work so far. If you can convince him to provide a patch. I may be able to apply it, taking care of making it enabled for the tA servers line only.
Thus, I'm not alone there, and I'd like to know whether the other devs are ok to apply such a functionality and explain why.
Again, I can do only one thing at a time, so be patient and don't hesitate to recall what I could have forgotten along the path. I'm only human.
Best regards.