feat(surveys branching): handle question deletion/rearrangement

[jurajmajerik]

Changes

If a survey has branching defined and the user tries to delete or rearrange questions:

• show a warning dialog
• delete all branching if dialog confirmed

We could theoretically try to detect if the given action actually affects branching, but not worth the effort at this point imo.

Follow-ups:

• Branching logic currently assumes the confirmation message is always present - make sure this is handled correctly
• Disable questions shuffling when branching logic is active and vice versa

How did you test this code?

👀

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[neilkakkar]

Nice, follow ups make sense 👍

[posthog-bot]

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