Added Flags.ForceUpdate on DebugPanels

ScriptableRenderPipeline/Core/CoreRP/Debugging/DebugUI.Panel.cs

 
             public bool isEditorOnly { get { return (flags & Flags.EditorOnly) != 0; } }
             public bool isRuntimeOnly { get { return (flags & Flags.RuntimeOnly) != 0; } }
+            public bool forceUpdate { get { return (flags & Flags.ForceUpdate) != 0; } }
 
             public ObservableList<Widget> children { get; private set; }
             public event Action<Panel> onSetDirty = delegate { };

ScriptableRenderPipeline/Core/CoreRP/Debugging/DebugUI.cs

         {
             None        = 0,
             EditorOnly  = 1 << 1,
-            RuntimeOnly = 1 << 2
+            RuntimeOnly = 1 << 2,
+            ForceUpdate = 1 << 4
         }
 
         // Base class for all debug UI widgets

ScriptableRenderPipeline/Core/CoreRP/Editor/Debugging/DebugWindow.cs

             // First init
             m_DebugTreeState = DebugManager.instance.GetState();
             UpdateWidgetStates();
+
+            EditorApplication.update -= Repaint;
+            var panels = DebugManager.instance.panels;
+            var selectedPanelIndex = m_Settings.selectedPanel;
+            if (selectedPanelIndex >= 0 
+                && selectedPanelIndex < panels.Count 
+                && panels[selectedPanelIndex].forceUpdate)
+                EditorApplication.update += Repaint;
         }
 
         // Note: this won't get called if the window is opened when the editor itself is closed
                         if (EditorGUI.EndChangeCheck())
                         {
                             Undo.RegisterCompleteObjectUndo(m_Settings, "Debug Panel Selection");
+                            var previousPanel = m_Settings.selectedPanel >= 0 && m_Settings.selectedPanel < panels.Count
+                                ? panels[m_Settings.selectedPanel]
+                                : null;
+                            if (previousPanel != null && previousPanel.forceUpdate && !panel.forceUpdate)
+                                EditorApplication.update -= Repaint;
+                            else if ((previousPanel == null || !previousPanel.forceUpdate) && panel.forceUpdate)
+                                EditorApplication.update += Repaint;
                             m_Settings.selectedPanel = i;
                         }
                     }