Well I also don't know how to recover a delated panel, aside from you have a full backup of your system that you recover completely?

But if it is enough to create a new quick launch panel here are the steps:
1.) left mouse click on empty part of the desktop so that the menu bar on top is selected to ambient
2.) right mouse click on top menu bar so that the ambient menu appears
3.) to to: "Settings" -> "Ambient..."
4.) a window "Ambient Settings" should be open now
5.) on left list click on "Panels" and on right site the tab "Panels" should be open showing in a tree all your panels
6.) click on Button "New Panel" and you have a new empty panel on your desktop that you can drag to any place you want
7.) rename the panel and change all the options you like for it's appearance and press button "Save"
8.) you can now easy drag and drop new application icons to your empty new panel