Everywhere: Add missing parent window to about dialogs

Partially addresses #5177.

Userland/Applications/Calculator/main.cpp

@@ -76,7 +76,7 @@ int main(int argc, char** argv)
     }));
 
     auto& help_menu = menubar->add_menu("Help");
-    help_menu.add_action(GUI::CommonActions::make_about_action("Calculator", app_icon));
+    help_menu.add_action(GUI::CommonActions::make_about_action("Calculator", app_icon, window));
 
     app->set_menubar(move(menubar));
 

Userland/Applications/Calendar/main.cpp

@@ -174,7 +174,7 @@ int main(int argc, char** argv)
     }));
 
     auto& help_menu = menubar->add_menu("Help");
-    help_menu.add_action(GUI::CommonActions::make_about_action("Calendar", app_icon));
+    help_menu.add_action(GUI::CommonActions::make_about_action("Calendar", app_icon, window));
 
     app->set_menubar(move(menubar));
     window->show();

Userland/Applications/DisplaySettings/main.cpp

@@ -74,7 +74,7 @@ int main(int argc, char** argv)
     }));
 
     auto& help_menu = menubar->add_menu("Help");
-    help_menu.add_action(GUI::CommonActions::make_about_action("Display Settings", app_icon));
+    help_menu.add_action(GUI::CommonActions::make_about_action("Display Settings", app_icon, window));
 
     app->set_menubar(move(menubar));
     window->show();

Userland/Applications/FileManager/main.cpp

@@ -647,7 +647,7 @@ int run_in_windowed_mode(RefPtr<Core::ConfigFile> config, String initial_locatio
     go_menu.add_action(go_to_location_action);
 
     auto& help_menu = menubar->add_menu("Help");
-    help_menu.add_action(GUI::CommonActions::make_about_action("File Manager", GUI::Icon::default_icon("filetype-folder")));
+    help_menu.add_action(GUI::CommonActions::make_about_action("File Manager", GUI::Icon::default_icon("filetype-folder"), window));
 
     GUI::Application::the()->set_menubar(move(menubar));