If I'm understanding correctly, the space weapons panel you're referring to only shows when you have your personal tray set to display one row of abilities. If your personal tray's bigger then you'll have to drag and drop your weapons into another row of the personal tray to see them.
In order to revert this change, click the symbol with the three cards at the top right side of your skills panel (/"big personal tray") and then select button number three.
Number 4 is the setting which removes the weapon selection and the boff skills - even though you could hide both fields seperately via the UI customization (which you can reach by pressing F12).
[I know that this topic is more than a month old but it's an issue that quite a few players may eventually stumble upon so it is worth posting the solution.]