Finished up splash screen implementation.

* Added stub methods for non-Windows platforms
 * Move canvas show to after tools have loaded
 * Fix a tab

Engine/source/platformX86UNIX/x86UNIXStub.dedicated.cpp

@@ -93,6 +93,7 @@ void Platform::openFile(const char *path) { }
 
 // window
 bool Platform::displaySplashWindow(String path) { return false; }
+bool Platform::closeSplashWindow() { return false; }
 
 // font
 PlatformFont *createPlatformFont(const char *name, U32 size, U32 charset) { return NULL; }