IP address dropdown not fully working

[lbleier-GSFC]

Describe the bug
The dropdown in the main window indicates "All" or "127.0.0.1" as options. When "All" is selected, it seems to work fine, but a Python exception is thrown when "127.0.0.1" is selected:

Traceback (most recent call last):
  File "GroundSystem.py", line 87, in startTlmSystem
    subscription = '--sub=GroundSystem.' + selectedSpacecraft + '.TelemetryPackets'
TypeError: must be str, not bytes

To Reproduce
Steps to reproduce the behavior:

1. Run the Python app
2. Select "127.0.0.1" from the IP address dropdown
3. Try opening the telemetry page

Expected behavior
Telemetry page should open and no crashes should occur

Reporter Info
Leor Bleier NASA GSFC\Code 582 (with support from @skliper)

[lbleier-GSFC]

The crash no longer occurs thanks to #72 but having the menu on 127.0.0.1 doesn't seem to work at all, not sure why

[thnkslprpt]

Working fine for me at the moment on Debian. Whatever was causing this may have been fixed up in one of the previous updates.