Add support to new SIP format

[hsilva-keep]

The graphical user interface (GUI) of the application should display a new option under “SIP
format” when the user selects the “Create SIP(s)” option.
The combo box should include an additional value called “Hungarian SIP 4”.

Hungarian SIP creation logic will be done in Commons-IP.

[hsilva-keep]

@jmaferreira this issue will be done by @nunovieira220 and not by @chalkos. If I remember correctly, we have decided that "view" is done essentially by @chalkos & "model/controller" by @nunovieira220. And this issue, besides adding the new option to the dropbox shown in the image above, is all about supporting the new SIP format. Right?

[jmaferreira]

Correct.

[jmaferreira]

Maybe an additional issue for the UI should be created?

[hsilva-keep]

@jmaferreira There's no need for that, @nunovieira220 knows precisely what he needs to do (also adding that new element to the combobox).

This task also relates to #251.

[nuno-vieira-deel]

Backend support added on 8ecd5f1

[hsilva-keep]

Done.