Reverts the FLYBY change and baby-proofs the UI

[TheGamerdk]

About the pull request

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Changelog

🆑
qol: Made it harder to fuck up evac by flyby-ing
/:cl:

[mullenpaul]

This is a step backwards when compared to the previous implementation. When there is an important action - such as launching the dropship - a single click of the UI should not trigger a launch. Rather than resolve the issue, a panicked PO can more easily trigger a flyby by clicking 'the red button'. There are now two buttons on display for launching the dropship.

The goal of the UI change was to have a single place where you could select your flight pattern, either to perform a flyby or to select a landing zone. The current TM branch resolves the issues identified with CAS flyby.