feat: Added deboarding button to flyPad Payload page

[frankkopp]

Closes #7561

Summary of Changes

• Adds a button to the flyPad Ground-Payload page to deboard all passengers and unload cargo.
• Changes Icon of boarding button to signify that it can be boarding or deboarding
• Reorders the tabs for the Ground pages to make them more following the procedure flow

Screenshots (if necessary)

flypadPayload.mp4

Discord username (if different from GitHub): Cdr_Maverick#6475

Testing instructions

Test loading and unloading payload (manual, SimBrief) and make sure the buttons are behaving correctly and working as intended.

How to download the PR for QA

Every new commit to this PR will cause a new A32NX artifact to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, click on the bottom PR tab
4. Click on the A32NX download link at the bottom of the page

[mico975]

Quality Assurance Tester Report

Discord : mico#3145
Object of testing: #7604
Tier of Testing : 1
Date : 22/11/2022

Testing Process:
Test loading and unloading payload (manual, SimBrief) and make sure the buttons are behaving correctly and working as intended. - OK

Negatives:
N/A

Testing Results:
Passed

Conclusions:
LGTM

Media: