[1.0.0] Incorrect tab width on choose-a-thing GUIs with 5 or 6 tabs

[raiguard]

This has been bothering me since March, but for some reason I never reported it, and apparently nobody else has either that I've been able to find.

With choose-a-thing GUIs (for example, the recipe / item selector in the controller GUI), a single row of five or six tabs will leave a gap at the right side, instead of taking up all of the available space:

2020-10-30 01_10_42-Factorio 1.0.0.png (124.67 KiB) Viewed 494 times

This problem goes away once there is more than one row.

It might make the most sense (and allow for cleaner code) if the category buttons were always buttons instead of changing between buttons and tabs. Then this issue wouldn't be relevant anymore, and the coloring of the selected category would be consistent.

[kovarex]

Well, it is not really incorect, we want to prefer tab as much as possible, and with 5 tabs, this is how it kind of ends up.