Multi Button mouse issue

With the latest update it seems that the number of buttons supported went from like 15 down to 5. Is there a workaround for us to get this functionality to work as it did prior to the update? I reverted back to previous install, but this is only a bandaid fix and hopefully there will be better way to utilize my mouse with healbot.

I use a 15 button MMO mouse and as of the newest update the "Spell" section was changed and instead of selecting a mouse button from a drop down menu and assigning the spell and modifiers, now you have buttons 1-5 assignments on the screen for a drop down for modifiers, and I can no longer assign my other 10 buttons, forcing me to use 9.0.2.2