Staff: Update Cinema: Menu bug

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(1) For every iteration of the for-loop to display the option menu, my number of options for "set cineplex code" just kept increasing?
part 1:

part 2:

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Let me try to reset my branch to test this bug out again.

UPDATE: yup, still the same, every option will cause additional 'set cineplex code' option to be created, so issue probably on the while loop level. new options created are "empty", not tied to runnable

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Noted updates.

Test:

Conclusion: issue of repeated 'set cineplex code' resolved, but random print of the warning for 'unable to edit cineplex code'

[Crystal Cheong]

Conclusion: issue of repeated 'set cineplex code' resolved, but random print of the warning for 'unable to edit cineplex code'

Warning is only printed when the Cinema has a Showtime with an active booking.

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#102