Apply button in options doesnt work

[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 changing options and clicking apply button changes doesn't apply

Reproduction steps:

1. Open the options menu and go to the Language tab
2. Change language
3. Click apply

Expected result: Language should change immediately

Real result: Language changes after closing the menu: it doesn't matter whether we click an ok button or cancel button

Used version: NanaZip 1.0 x64