The cluster and QSO monitor split its two tables at half the height, fixed:
the Compose port had left the JavaFX SplitPane out until a splitter existed.
SplitterPane exists now, so the monitor uses it and reads and writes the same
profile value the SplitPane did (GUIpnl_directedMSGWin_dividerpositionDefault,
default 0.8), so a profile gets its old position back. Each heading now sits
in the pane of its table, and the "DX cluster" heading is translated
(monitor.dxCluster).
Fixes#144.
Claude-Session: https://claude.ai/code/session_01AaorTymXfkXPm8yb4Btva7
Co-authored-by: Claude <noreply@anthropic.com>