Make fossilization buttons' positioning account for screen distortion

[dligr]

Brief Description of What This PR Does

Applies chromatic abberation (barrel distortion) to fossilization buttons' positions, placing them where microbes visually are.

This requires an inverse function. The true inverse function for barrel distortion would be way too complex (something like this), so this PR uses an approximation, though its inaccuracy seems almost negligible. It breaks when the given position is outside of the screen, but it's fixable with clamping.

Related Issues

Fossilization buttons being too far from their microbes

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.