src: miscellaneous fixes

* fixed code view snippet minimize click expanded snippet again
* fixed typedef nodes node grouped within file group
* fixed splitting anonymous namespace bundle increased group nesting instead
* fixed build, tests and clang warnings

src/lib/utility/file/FilePath.cpp

@@ -344,7 +344,7 @@ FilePath FilePath::getLowerCase() const
 
 bool FilePath::contains(const FilePath& other) const
 {
-	if (exists() && !isDirectory())
+	if (!isDirectory())
 	{
 		return false;
 	}