fix engine sniffer repaint (#3981)

java_console/ui/src/main/java/com/rusefi/ui/engine/EngineSnifferPanel.java

@@ -221,10 +221,8 @@ public class EngineSnifferPanel {
             image.setWaveReport(wr, revolutions);
         }
 
-        /**
-         * this is to fix the UI glitch when images tab shows a tiny square
-         */
-        UiUtils.trueLayout(chartPanel.getParent());
+        // Repaint now that we've updated state
+        SwingUtilities.invokeLater(() -> UiUtils.trueRepaint(imagePanel));
     }
 
     public JPanel getPanel() {

java_console/ui/src/main/java/com/rusefi/ui/engine/UpDownImage.java

@@ -129,7 +129,6 @@ public class UpDownImage extends JPanel {
         this.engineReport = wr;
         propagateDwellIntoSensor(wr);
         this.revolutions = revolutions;
-        UiUtils.trueRepaint(this);
     }
 
     private void propagateDwellIntoSensor(EngineReport wr) {