ui: scope names in snippet titles

* added title for snippets
* title displays name of parent scope.
* when new TokenLocationFiles are created in the storage they are now returned as shared_ptr to ensure correct linking in the contained data.
* Storage::getTokenLocationsForLinesInFile() now always returns pairs of start and end locations.
* Adjusted code snippet view to regard the change described above.

src/lib/component/view/CodeView.h

@@ -1,6 +1,8 @@
 #ifndef CODE_VIEW_H
 #define CODE_VIEW_H
 
+#include <memory>
+
 #include "component/view/View.h"
 #include "data/location/TokenLocationFile.h"
 #include "utility/types.h"
@@ -21,9 +23,10 @@ public:
 		uint endLineNumber;
 		uint lineCount;
 
+		std::string title;
 		std::string code;
 
-		TokenLocationFile locationFile;
+		std::shared_ptr<TokenLocationFile> locationFile;
 
 		bool isActive;
 		bool isDeclaration;