Merge GUI updates into macOS branch

# Conflicts:
#	src/GlobeWidget.cpp
#	src/GlobeWidget.h
#	src/MainWindow.h
#	src/MapWidget.cpp
#	src/MapWidget.h
#	src/RinexNavigation.cpp

src/MapWidget.cpp

@@ -224,6 +224,11 @@ void MapWidget::clearCepMarker()
     update();
 }
 
+QPointF MapWidget::centerCoordinate() const
+{
+    return QPointF(m_centerLat, m_centerLon);
+}
+
 void MapWidget::setAutoFollow(bool enabled)
 {
     if (m_autoFollow == enabled) {
@@ -779,11 +784,14 @@ void MapWidget::disableAutoFollowFromUserAction()
 
 int MapWidget::preferredFocusIndex() const
 {
-    // Once corrected ESKF output is present, both camera and detail bubble
-    // stay locked to its newest point. Raw GPS and truth records may arrive
-    // later in an interleaved stream and must not pull the camera away.
+    constexpr qint64 CorrectedPreferenceWindowMs = 1000;
+    const int newestIndex = m_points.size() - 1;
     for (int index = m_points.size() - 1; index >= 0; --index) {
-        if (m_points[index].source == LocationSource::ImuCorrected) return index;
+        if (m_points[index].source == LocationSource::ImuCorrected) {
+            const qint64 ageMs = m_points[index].receivedAt.msecsTo(
+                m_points[newestIndex].receivedAt);
+            return ageMs <= CorrectedPreferenceWindowMs ? index : newestIndex;
+        }
     }
-    return m_points.isEmpty() ? -1 : m_points.size() - 1;
+    return newestIndex;
 }