ProcessManager: Rename it to SystemMonitor

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

Applications/SystemMonitor/ProcessTableView.cpp

@@ -0,0 +1,42 @@
+#include "ProcessTableView.h"
+#include "ProcessModel.h"
+#include <LibGUI/GSortingProxyModel.h>
+#include <stdio.h>
+
+ProcessTableView::ProcessTableView(GraphWidget& graph, GWidget* parent)
+    : GTableView(parent)
+{
+    set_size_columns_to_fit_content(true);
+    set_model(GSortingProxyModel::create(ProcessModel::create(graph)));
+    model()->set_key_column_and_sort_order(ProcessModel::Column::CPU, GSortOrder::Descending);
+    refresh();
+
+    on_selection = [this](auto&) {
+        if (on_process_selected)
+            on_process_selected(selected_pid());
+    };
+}
+
+ProcessTableView::~ProcessTableView()
+{
+}
+
+void ProcessTableView::refresh()
+{
+    model()->update();
+}
+
+void ProcessTableView::model_notification(const GModelNotification& notification)
+{
+    if (notification.type() == GModelNotification::ModelUpdated) {
+        // Do something?
+        return;
+    }
+}
+
+pid_t ProcessTableView::selected_pid() const
+{
+    if (!model()->selected_index().is_valid())
+        return -1;
+    return model()->data(model()->index(model()->selected_index().row(), ProcessModel::Column::PID), GModel::Role::Sort).as_int();
+}