Includes mirror problems when searching with selected holds

[Theruz]

Some board have a mirror layout. When searching for problems with a selection of holds, it would be convenient that the search results also includes mirrored problems

for example, searching with these holds

should allows finding this problem

(really nice work on climbdex !!)

[Theruz]

(I already implemented a proposition, I'll gladly create a PR)

[lemeryfertitta]

Absolutely, makes sense. Happy to review your PR, thanks for contributing!

[lemeryfertitta]

Deployed - feel free to reopen/create a new issue if anything comes up.