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/data/location/TokenLocationCollection.cpp

@@ -105,11 +105,11 @@ TokenLocationFile* TokenLocationCollection::findTokenLocationFileByPath(const Fi
 	return nullptr;
 }
 
-void TokenLocationCollection::forEachTokenLocationFile(std::function<void(TokenLocationFile*)> func) const
+void TokenLocationCollection::forEachTokenLocationFile(std::function<void(std::shared_ptr<TokenLocationFile>)> func) const
 {
 	for (const TokenLocationFilePairType& file : m_files)
 	{
-		func(file.second.get());
+		func(file.second);
 	}
 }
 
@@ -188,9 +188,9 @@ TokenLocationFile* TokenLocationCollection::createTokenLocationFile(const FilePa
 std::ostream& operator<<(std::ostream& ostream, const TokenLocationCollection& base)
 {
 	ostream << "Locations:\n";
-	base.forEachTokenLocationFile([&ostream](TokenLocationFile* f)
+	base.forEachTokenLocationFile([&ostream](std::shared_ptr<TokenLocationFile> f)
 	{
-		ostream << *f;
+		ostream << *(f.get());
 	});
 	return ostream;
 }

src/lib/data/location/TokenLocationCollection.h

@@ -38,7 +38,7 @@ public:
 	TokenLocation* findTokenLocationById(Id id) const;
 	TokenLocationFile* findTokenLocationFileByPath(const FilePath& filePath) const;
 
-	void forEachTokenLocationFile(std::function<void(TokenLocationFile*)> func) const;
+	void forEachTokenLocationFile(std::function<void(std::shared_ptr<TokenLocationFile>)> func) const;
 	void forEachTokenLocationLine(std::function<void(TokenLocationLine*)> func) const;
 	void forEachTokenLocation(std::function<void(TokenLocation*)> func) const;