This PR fixes #2656 and fixes #2654 by completely rewriting the UI of the multi-level wind input. Previously, I attempted to put everything in a JTable. However, this solution was not flexible and required some hacks, which caused issues in units and decimal rounding. The new solution is to place the input in a dedicated dialog, which includes the wind profile visualization by default.

The multi-level panel in the sim dialog contains an overview of the wind levels:

Demo:

Notable changes:

• Unit selectors are in the headers and affect all rows, instead having one selector for each row (doesn't make much sense to want to change individual cell units)
• Profile visualization is embedded in the wind edit dialog and dynamically responds to the wind table (highlight the selected row dot, update the units)
• Added tooltip information to the profile visualization dots
• Make it more clear that rows are resorted according to altitude. The moved row and its previous and next row are highlighted in a yellow color. Also when adding a new row and deleting a row, the highlighting is applied.
• Added a "Reset levels" button to reset the table back to its default state

And a bunch of other improvements.

This PR also adds a new "Wind direction" flight data type. It didn't make sense before multi-level wind to include this (it remained constant), but for multi-level winds it can change throughout the flight.