Don't InvalidateCursor unless it's actually in the viewport

src/renderer/base/renderer.cpp

@@ -281,10 +281,10 @@ void Renderer::TriggerRedrawCursor(const COORD* const pcoord)
         // The region is clamped within the viewport boundaries and we only
         // trigger a redraw if the region is not empty.
         Viewport view = _pData->GetViewport();
-        cursorView = view.Clamp(cursorView);
-
-        if (cursorView.IsValid())
+        if (view.IsInBounds(cursorView))
+        // if (cursorView.IsValid())
         {
+            cursorView = view.Clamp(cursorView);
             const SMALL_RECT updateRect = view.ConvertToOrigin(cursorView).ToExclusive();
             for (IRenderEngine* pEngine : _rgpEngines)
             {

src/renderer/dx/DxRenderer.cpp

@@ -1189,6 +1189,7 @@ try
             _invalidMap.translate(deltaCells, true);
             _invalidScroll += deltaCells;
             _allInvalid = _IsAllInvalid();
+            _lastCursor += deltaCells;
         }
     }
 

src/renderer/dx/ScreenPixelShader.h

@@ -91,7 +91,7 @@ float4 main(float4 pos : SV_POSITION, float2 tex : TEXCOORD) : SV_TARGET
 #endif
 
 constexpr std::string_view nopPixelShaderString{ R"(
-// Nop shader used for normal operations
+// No-op shader used for normal operations
 Texture2D shaderTexture;
 SamplerState samplerState;
 cbuffer PixelShaderSettings {