Adding colormap scale is not dependent on type of source

plugins/ScreenPanel4.java

@@ -170,13 +170,20 @@ public class ScreenPanel4 extends Panel {
         public double colormapMax;
         public Colormap colormap;
         public boolean colormapLogarithmic;
+        
+        String getFile() {
+            if (camera == null) {
+                return null;
+            }
+            return getContext().getSetup().expandPath("{context}/screen_panel/" + cameraName + ".properties");
+        }        
     }
 
     void loadCameraState() {
         if (persistCameraState) {
             try {
                 CameraState state = new CameraState();
-                state.load(getCameraConfigFile());
+                state.load(state.getFile());
                 if (state.valid) {
                     buttonSidePanel.setSelected(state.showSidePanel);
                     buttonSidePanelActionPerformed(null);
@@ -229,7 +236,7 @@ public class ScreenPanel4 extends Panel {
                 state.showScale = buttonScale.isSelected();
                 state.showTitle = buttonTitle.isSelected();
 
-                state.save(getCameraConfigFile());
+                state.save(state.getFile());
             } catch (Exception ex) {
                 ex.printStackTrace();
             }
@@ -742,13 +749,6 @@ public class ScreenPanel4 extends Panel {
         super.onStop();
     }
 
-    String getCameraConfigFile() {
-        if (camera == null) {
-            return null;
-        }
-        return getContext().getSetup().expandPath("{context}/screen_panel/" + camera.getName() + ".properties");
-    }
-
     //Overridable callbacks
     @Override
     public void onInitialize(int runCount) {