Close transient log-specific windows when a log closes

* Shader viewers already close themselves, but the pixel history view,
  non-mesh buffer viewers, and constant buffer views also close.

qrenderdoc/Windows/BufferViewer.cpp

@@ -1166,6 +1166,9 @@ void BufferViewer::OnLogfileLoaded()
 void BufferViewer::OnLogfileClosed()
 {
   Reset();
+
+  if(!m_MeshView)
+    ToolWindowManager::closeToolWindow(this);
 }
 
 void BufferViewer::OnEventChanged(uint32_t eventID)

qrenderdoc/Windows/ConstantBufferPreviewer.cpp

@@ -88,6 +88,8 @@ void ConstantBufferPreviewer::OnLogfileClosed()
   ui->variables->clear();
 
   ui->saveCSV->setEnabled(false);
+
+  ToolWindowManager::closeToolWindow(this);
 }
 
 void ConstantBufferPreviewer::OnEventChanged(uint32_t eventID)

qrenderdoc/Windows/PixelHistoryView.cpp

@@ -609,11 +609,14 @@ PixelHistoryView::PixelHistoryView(ICaptureContext &ctx, ResourceId id, QPoint p
   ui->events->header()->setSectionResizeMode(2, QHeaderView::ResizeToContents);
   ui->events->header()->setSectionResizeMode(3, QHeaderView::ResizeToContents);
   ui->events->header()->setSectionResizeMode(4, QHeaderView::ResizeToContents);
+
+  m_Ctx.AddLogViewer(this);
 }
 
 PixelHistoryView::~PixelHistoryView()
 {
   ui->events->setModel(NULL);
+  m_Ctx.RemoveLogViewer(this);
   delete ui;
 }