ProcessManager: Rename it to SystemMonitor

This is a more appropriate name now that it does a lot
more than just manage processes ^)

Applications/SystemMonitor/NetworkStatisticsWidget.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <LibCore/CTimer.h>
+#include <LibGUI/GWidget.h>
+
+class GTableView;
+
+class NetworkStatisticsWidget final : public GWidget {
+    C_OBJECT(NetworkStatisticsWidget)
+public:
+    explicit NetworkStatisticsWidget(GWidget* parent = nullptr);
+    virtual ~NetworkStatisticsWidget() override;
+
+private:
+    void update_models();
+
+    GTableView* m_adapter_table_view { nullptr };
+    GTableView* m_socket_table_view { nullptr };
+    CTimer* m_update_timer { nullptr };
+};