Allow per pilot loadouts and properties.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/3092.

qt_ui/blocksignals.py

@@ -0,0 +1,13 @@
+from collections.abc import Iterator
+from contextlib import contextmanager
+
+from PySide6.QtWidgets import QWidget
+
+
+@contextmanager
+def block_signals(widget: QWidget) -> Iterator[None]:
+    blocked = widget.blockSignals(True)
+    try:
+        yield
+    finally:
+        widget.blockSignals(blocked)