`GUI` implement remaining cli options

[Darthyson]

These command line arguments have no equivalent in the GUI:

1. --statistic added in 7607155
2. --tunnelingv2 and --tunneling added in 0bbb2a3
3. --blocksize added in a9b5be8
4. --logLevel added in 478a1dc
5. --DUMPFLASH added in a4742ad
6. --routing added in 9ff2412
7. --localhost added in 9ff2412
8. --localport added in 9ff2412
9. --help added in 9ff2412
10. --version added in 9ff2412

The numbering is for ease of discussion only.