Add Ctrl+click menu item tip.

src/app/TipWindow.cpp

@@ -45,6 +45,7 @@ static std::vector<TipInfo> tipInfos = {
 	{"Know C++ programming and want to create your own modules for Rack? Developing Rack modules is a great way to learn digital signal processing and quickly test your ideas with an easy-to-learn platform.\n\nDownload the Rack SDK and follow the official tutorial to get started.", "Plugin Development Tutorial", "https://vcvrack.com/manual/PluginDevelopmentTutorial"},
 	{"Wondering how to use a particular module? Right-click its panel and choose “Info > User manual”.\n\nYou can also open the module's Info menu to view the module's tags, website, VCV Library entry, and changelog.", "", ""},
 	{"Did you know that ModularGrid is integrated with the VCV Library? If a Eurorack version of a Rack module is available, right-click its panel and choose “Info > ModularGrid”, or click the “ModularGrid” link on its VCV Library page.\nOn ModularGrid.net, search for the “Available for VCV Rack” link if a hardware module has a virtual Rack version.", "Example: Grayscale Permutation on ModularGrid", "https://www.modulargrid.net/e/grayscale-permutation-18hp"},
+	{"You can " RACK_MOD_CTRL_NAME "+click a menu item to keep its menu open. This can be useful when browsing many module presets.", "", ""},
 	// {"", "", ""},
 };