Simplify logic of checking for failing hard/soft constraints in tabs/containers

[nirvn]

Well, unsure why I went for the hyper convoluted way before now, but this code is much, much cleaner.

Hoping this will fix some crash reported on sentry, e.g.:

https://opengisch.sentry.io/issues/4307906818/?project=6119013&query=is%3Aunresolved+child&referrer=issue-stream&statsPeriod=14d&stream_index=1

https://opengisch.sentry.io/issues/4483277442/?project=6119013&query=is%3Aunresolved+child&referrer=issue-stream&statsPeriod=14d&stream_index=3

https://opengisch.sentry.io/issues/4341391515/?project=6119013&query=is%3Aunresolved+child&referrer=issue-stream&statsPeriod=14d&stream_index=4

I can't reproduce myself but I'm hoping the simplified code will fix things.

[qfield-fairy]

🎉 Ta-daaa, freshly created APKs are available for 9f8a502: arm64-android

Other architectures

• arm-neon-android
• x64-android
• x86-android
• all access arm64-android
• all access arm-neon-android
• all access x64-android
• all access x86-android

[suricactus]

For the review I decided I first check the old code to see if you missed something. I was expecting a recursion there but... So the PR is implementing the exact logic I would apply. Good move.