Set GlobalCEFApp.GTKVersion to gtkVersion3 in TinyBrowser and TinyBrowser2 for Lazarus and GTK3 in order to avoid an initial error because the app and Chromium are trying to load diferent versions of GTK.
Converted the OSRExternalPumpBrowser demo to GTK3
Converted the TinyBrowser demo to GTK3
Converted the TinyBrowser2 demo to GTK3
Moved all Lazarus demos for Linux to the Lazarus_Linux_GTK2 directory
Fixed the Copy.CEF.DLLs tool thanks to fraurino