Keyboard overlay covers bottom calculator keys

Opening the keyboard pushes the calculator up, but not high-enough to expose all the keys; Design may need to weigh in on the proper way to handle it.

Reproduction

1. Open Calculator
2. Open Keyboard overlay
3. Notice shifting calculator upward
4. Notice overlap still

librem-5-chestnut-calculator-keyboard-overlay-2020-01-18

purism@librem-5-birch:~$ dpkg -s phosh | grep Version
Version: 0.1.7
purism@librem-5-birch:~$ dpkg -s gnome-calculator | grep Version
Version: 3.34.1+5127+gitb593e727-1pureos0
purism@librem-5-birch:~$ uname -a
Linux librem-5-birch 5.3.0-librem5-h1 #1 SMP PREEMPT Tue Jan 7 10:16:00 CET 2020 aarch64 GNU/Linux
purism@librem-5-birch:~$