Allow serial port to be manual entry or pick from list.
Serial port select combo-box
Remove rogue console.log
Don't show edit dialog for dblclick-drag
Closes #217
Delay node dropping intermediate messages incorrectly
Prevent accidental edit of nodes
Part of #217
Tweaks to shorten Serialport html names.
and remove redundant code.
Log.addHandler missing its implementation
Function error not recognised as TypeError
Remove console.log in credentials