Wrong IP format when using the "prompt IP" option (or "select IP" option)

[pvi-github]

Hello,

In current Android version of Fwknop2 when you choose "Prompt IP" it lets us type this kind of string

[0-9]*\.[0-9]*

If you try to type a second dot it will not accept it and type nothing.

A more correct regexp format would be : [0-9]*\.[0-9]*\.[0-9]*\.[0-9]* allowing to type all the 4 parts of the IP

Note : The same problem shows up when you try to use the fixed IP option. Maybe the string format control function is common.

Disclaimer : I dont know how string format it controlled there in this field but it made me imagine a regexp... at least i hope it will lead devs in the right direction.

[pvi-github]

Fixed a typo in the title. And added that the bug also concerns the "Select IP" option.

poke @jp-bennett @mrash ?