Open inside option should be visible only for folders and archives

[mateuszbasiak]

Together with @JKolodziejczyk and @apospieszny, we have been testing NanaZip as the final project for the Software Testing course at Jagiellonian University. Here is one of our results:

When clicking Open inside options in NanaZip's explorer's context menu on different types of files than folders and archives nothing happens, so therefore this option shouldn't be shown.

Used version: NanaZip 1.0 x64