Fix file Load of EntranceAltitude in StructureScanComplexItem.cc

[diox8tony]

Entrance altitude does not load form File (structure scan)

Description

Structure Scan Load File, results in a 0 for EntranceAltitude edit box.
Wrong JSON tag being used to lookup the Entrance Altitude.

"_entranceAltName" is the correct JSON string to use. As seen in ::save()

Test Steps

Create a Structure Scan plan. (I tested with Circle type, but it shouldn't matter).
Edit the "Entrance Altitude" in the Structure scan editor, to a memorable number.
Save this plan to file.
Clear plan.
Load the plan file.
The Entrance Altitude variable will be 0.

(the plan file has the correct value)

Checklist:

• [ X] Review Contribution Guidelines.
• [ X] Review Code of Conduct.
• [ X] I have tested my changes.

Related Issue

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