Filter unlocked researches of player

[iTwins]

Description

When you first researched an item then disabled it you would still have the research. Sf stats however doesn't count researches without any enabled items for the total amount of researches. This means you could have more researches unlocked then the 'total'. This resulted in a fraction >1, thus an index >= titels.size, thus throwing an IndexOutOfBounds exception.

Proposed changes

Also filter the unlocked researches of the player to only include researches with at least 1 enabled item.

Related Issues (if applicable)

Resolved #3995

Checklist

• I have fully tested the proposed changes and promise that they will not break everything into chaos.
• I have also tested the proposed changes in combination with various popular addons and can confirm my changes do not break them.
• I have made sure that the proposed changes do not break compatibility across the supported Minecraft versions (1.16.* - 1.20.*).
• I followed the existing code standards and didn't mess up the formatting.
• I did my best to add documentation to any public classes or methods I added.
• I have added Nonnull and Nullable annotations to my methods to indicate their behaviour for null values
• I added sufficient Unit Tests to cover my code.

[github-actions]

Your Pull Request was automatically labelled as: "✨ Fix"
Thank you for contributing to this project! ❤️

[github-actions]

Slimefun preview build

A Slimefun preview build is available for testing!
Commit: c418140a

https://preview-builds.walshy.dev/download/Slimefun/3996/c418140a

Note: This is not a supported build and is only here for the purposes of testing.
Do not run this on a live server and do not report bugs anywhere but this PR!

[TheBusyBiscuit]

LGTM 👍🏻 Very nice

[JustAHuman-xD]

LGTM