NewportCONEX: Bugfixes by Marco Furchi

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14147 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
UserDefinedSerial: Remove fixed byte count response mode

With the current shutter and state device functionality, the
fixed-length binary mode is redundant and the variable-length mode works
in all cases. Remove clutter from the per-init properties.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14148 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
UserDefinedSerial: Improve response mode names

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14149 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd