Close (X) button in Settings doesn't discard changes (No "Cancel" button)

[mIRCon]

Please complete the following information:

• Version: 5.3.0-beta2
• Game Version: Odyssey
• OS: Windows 10
• OS Locale: English

Describe the bug When you make some changes in Settings window and you press close (X) button those changes are still saved. Due to lack of "Cancel" button one might expect Close (X) does the classic "discard changes" function but it's acting as if "OK" was pressed.

To Reproduce

1. Go to File -> Settings.
2. Make some changes (add api key, select some options etc).
3. Press Close (X) button in order to discard changes.

Expected behavior Discard changes you made when you press close (X) button in Options window.

Screenshots N/A

Additional context Maybe to consider a true "Cancel" button which does what it usually does and just have Close (X) button follow the same function.