Improve UI for flight properties.

Use the new data from pydcs to improve the properties UI:

* Use human readable names
* Use appropriate control types
* Limit min and max values as appropriate for each property
* Show labels

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/3090.

qt_ui/windows/mission/flight/payload/missingpropertydataerror.py

@@ -0,0 +1,2 @@
+class MissingPropertyDataError(RuntimeError):
+    ...