update Changes.md

Author: clarasb

CHANGES.md

@@ -6,7 +6,12 @@
   function no longer worked with irregular grid mappings, such as Sentinel-3 data,   
   due to changes introduced in version 1.8.0. (#1114)
 
-  
+### Other Changes  
+
+* Added demo panel `Spectral View` that creates a plot with the reflectances 
+  for one selected Place (Point) at a selected time for variables that
+  represent wavelengths.
+
 ## Changes in 1.8.0
 
 ### Enhancements

examples/serve/panels-demo/my_viewer_ext/my_panel_3.py

@@ -54,7 +54,7 @@ def render_panel(
         # multiple=True,
     )
 
-    # interesting, when multiple=True
+    # when multiple=True
     variable_names = get_variables(dataset)
     select_variables = ""  # variable_names , when multiple=True
     select_variables = Select(
@@ -65,9 +65,7 @@ def render_panel(
         # multiple=True,
     )
 
-    button = Button(
-        id="button", text="Update"  # "ADD Place to Spectral View"
-    )  # , style={"maxWidth": 100})
+    button = Button(id="button", text="Update")  # , style={"maxWidth": 100})
 
     controls = Box(
         children=[select_places, select_variables, button],
@@ -240,6 +238,8 @@ def update_plot(
         )
     ).properties(width=560, height=260)
 
+    update_last_timelabel(time_label)
+
     return chart