Renamed vncOptions to globalOptions.

The settings filename on disk has changed too, so the first time
users run this version of the Launcher they will need to re-enter
their auth_mode preference etc.

Launcher now remembers the last used tab (MASSIVE or CVL).

Moved SubmitDebugReportDialog.py inside logger/ subdirectory.

Removed some code which was used for unit-testing of individual
classes from the command-line, because it is no longer necessary.

Renamed optionsDialog.py's class from LauncherOptionsDialog to
GlobalOptionsDialog to distinguish it from the other class named
LauncherOptionsDialog in LauncherOptionsDialog.py.