Add optimal value markers to tolerance sliders

[dligr]

Brief Description of What This PR Does

Adds markers which indicate optimal tolerance values of the patch. Also adds min/max value labels at the ends of sliders.

This is supposed to improve the clarity of the tolerance panel and make it easier to find good tolerance values.

Related Issues

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Progress Checklist

Note: before starting this checklist the PR should be marked as non-draft.

• PR author has checked that this PR works as intended and doesn't
  break existing features:
  https://wiki.revolutionarygamesstudio.com/wiki/Testing_Checklist
  (this is important as to not waste the time of Thrive team
  members reviewing this PR)
• Initial code review passed (this and further items should not be checked by the PR author)
• Functionality is confirmed working by another person (see above checklist link)
• Final code review is passed and code conforms to the
  styleguide.

Before merging all CI jobs should finish on this PR without errors, if
there are automatically detected style issues they should be fixed by
the PR author. Merging must follow our
styleguide.

[hhyyrylainen]

I'll wait checking this until I'm done with the feature of organelles affecting the tolerances as that needs quite a lot of GUI changes (which sadly will then mean there will be merge conflicts here).

[hhyyrylainen]

This can now continue with this being merged: #5969