ProcessManager: Rename it to SystemMonitor

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

Applications/SystemMonitor/Makefile

@@ -11,6 +11,6 @@ OBJS = \
     NetworkStatisticsWidget.o \
     main.o
 
-APP = ProcessManager
+APP = SystemMonitor
 
 include ../Makefile.common

Applications/SystemMonitor/main.cpp

@@ -129,7 +129,7 @@ int main(int argc, char** argv)
     toolbar->add_action(continue_action);
 
     auto menubar = make<GMenuBar>();
-    auto app_menu = make<GMenu>("Process Manager");
+    auto app_menu = make<GMenu>("System Monitor");
     app_menu->add_action(GAction::create("Quit", { Mod_Alt, Key_F4 }, [](const GAction&) {
         GApplication::the().quit(0);
         return;
@@ -195,13 +195,13 @@ int main(int argc, char** argv)
     };
 
     auto* window = new GWindow;
-    window->set_title("Process Manager");
+    window->set_title("System Monitor");
     window->set_rect(20, 200, 680, 400);
     window->set_main_widget(keeper);
 
     window->show();
 
-    window->set_icon(load_png("/res/icons/16x16/app-process-manager.png"));
+    window->set_icon(load_png("/res/icons/16x16/app-system-monitor.png"));
 
     return app.exec();
 }