LibGUI: Rename GEventLoop::exit() and GApplication::exit() to quit().

These functions don't exit immediately, but rather on the next iteration
of the event loop.

Since exit() is already used by the standard library, let's call it quit()
instead. That way, saying exit() means the same thing here as anywhere else.

Applications/About/main.cpp

@@ -39,7 +39,7 @@ int main(int argc, char** argv)
     quit_button->set_caption("Okay");
     quit_button->set_relative_rect(80, 100, widget->width() - 160, 20);
     quit_button->on_click = [] (GButton&) {
-        GApplication::the().exit(0);
+        GApplication::the().quit(0);
     };
 
     window->show();

Applications/FileManager/main.cpp

@@ -19,7 +19,7 @@ int main(int argc, char** argv)
 
     auto app_menu = make<GMenu>("FileManager");
     app_menu->add_action(make<GAction>("Quit", String(), [] (const GAction&) {
-        GApplication::the().exit(0);
+        GApplication::the().quit(0);
         return;
     }));
     menubar->add_menu(move(app_menu));

Applications/Terminal/Terminal.cpp

@@ -27,12 +27,12 @@ Terminal::Terminal(int ptm_fd)
         if (nread < 0) {
             dbgprintf("Terminal read error: %s\n", strerror(errno));
             perror("read(ptm)");
-            GApplication::the().exit(1);
+            GApplication::the().quit(1);
             return;
         }
         if (nread == 0) {
             dbgprintf("Terminal: EOF on master pty, closing.\n");
-            GApplication::the().exit(0);
+            GApplication::the().quit(0);
             return;
         }
         for (ssize_t i = 0; i < nread; ++i)

Applications/Terminal/main.cpp

@@ -98,7 +98,7 @@ int main(int argc, char** argv)
     auto app_menu = make<GMenu>("Terminal");
     app_menu->add_action(make<GAction>("Quit", String(), [] (const GAction&) {
         dbgprintf("Terminal: Quit menu activated!\n");
-        GApplication::the().exit(0);
+        GApplication::the().quit(0);
         return;
     }));
     menubar->add_menu(move(app_menu));

LibGUI/GApplication.cpp

@@ -26,9 +26,9 @@ int GApplication::exec()
     return m_event_loop->exec();
 }
 
-void GApplication::exit(int exit_code)
+void GApplication::quit(int exit_code)
 {
-    m_event_loop->exit(exit_code);
+    m_event_loop->quit(exit_code);
 }
 
 void GApplication::set_menubar(OwnPtr<GMenuBar>&& menubar)

LibGUI/GApplication.h

@@ -12,7 +12,7 @@ public:
     ~GApplication();
 
     int exec();
-    void exit(int);
+    void quit(int);
 
     void set_menubar(OwnPtr<GMenuBar>&&);
 

LibGUI/GEventLoop.cpp

@@ -66,7 +66,7 @@ GEventLoop& GEventLoop::main()
     return *s_mainGEventLoop;
 }
 
-void GEventLoop::exit(int code)
+void GEventLoop::quit(int code)
 {
     m_exit_requested = true;
     m_exit_code = code;
@@ -257,7 +257,7 @@ void GEventLoop::wait_for_event()
         if (event.type == WSAPI_ServerMessage::Error) {
             dbgprintf("GEventLoop got error message from server\n");
             dbgprintf("  - error message: %s\n", String(event.text, event.text_length).characters());
-            exit(1);
+            quit(1);
             return;
         }
 
@@ -307,7 +307,7 @@ bool GEventLoop::drain_messages_from_server()
         ssize_t nread = read(m_event_fd, &message, sizeof(WSAPI_ServerMessage));
         if (nread < 0) {
             perror("read");
-            exit(1);
+            quit(1);
             return false;
         }
         if (nread == 0)

LibGUI/GEventLoop.h

@@ -32,7 +32,7 @@ public:
     void register_notifier(Badge<GNotifier>, GNotifier&);
     void unregister_notifier(Badge<GNotifier>, GNotifier&);
 
-    void exit(int);
+    void quit(int);
 
     bool post_message_to_server(const WSAPI_ClientMessage&);
     bool wait_for_specific_event(WSAPI_ServerMessage::Type, WSAPI_ServerMessage&);

LibGUI/GWindow.cpp

@@ -46,7 +46,7 @@ void GWindow::close()
     // FIXME: If we exit the event loop, we're never gonna deal with the delete_later request!
     //        This will become relevant once we support nested event loops.
     if (should_exit_app_on_close())
-        GEventLoop::main().exit(0);
+        GEventLoop::main().quit(0);
     delete_later();
 }