Merge branch 'develop' into recovery-firmware

# Conflicts:
#	src/CMakeLists.txt
#	src/displayapp/DisplayApp.h
#	src/systemtask/SystemTask.cpp
#	src/systemtask/SystemTask.h

docker/Dockerfile

@@ -22,6 +22,7 @@ RUN apt-get update -qq \
     && rm -rf /var/cache/apt/* /var/lib/apt/lists/*;
 
 RUN pip3 install adafruit-nrfutil
+RUN pip3 install -Iv cryptography==3.3
 
 # build.sh knows how to compile
 COPY build.sh /opt/