On mobile android, cannot leave standard on-screen keyboard closed and just use math keyboard

[jaltekruse]

hitting the buttons on the math keyboard makes mathquill lose/gain focus, which prompts re-opening the standard keyboard.

I could consider hiding the standard keyboard entirely and having number/letter keys on-screen (would also make Free Math more useful when presenting with a smart board). I did on mobile at least consider it poping up the native keyboard as a feature to accommodate other non-english characters. I'm unsure how common it is for other countries to use characters outside of the English or greek alphabet (or characters with accents) in math.

[jaltekruse]

Another way to improve the app on mobile is to make the buttons for doing different actions always visible to prevent the need to scroll around to find them. They could just be pinned to the bottom of the screen. Might want to also pin the math keyboard to the bottom of the screen on mobile when it is shown on its own with the system keyboard hidden.