logic: Fixed sorting of search results and crash in undo redo controller

src/lib/data/Storage.cpp

@@ -220,8 +220,8 @@ std::vector<SearchMatch> Storage::getAutocompletionMatches(const std::string& qu
 	const size_t maxResultCount = 100;
 	std::vector<SearchResult> elementResults = m_elementIndex.search(query, maxResultCount);
 	std::sort(elementResults.begin(), elementResults.end(), [](
-		SearchResult a,
-		SearchResult b)
+		const SearchResult& a,
+		const SearchResult& b)
 		{
 			// should a be ranked higher than b?
 			if (a.score > b.score)
@@ -240,7 +240,7 @@ std::vector<SearchMatch> Storage::getAutocompletionMatches(const std::string& qu
 					// move uppercase letters to higher ascii range
 					std::string sA = utility::switchCases(a.text);
 					std::string sB = utility::switchCases(b.text);
-					return (sA.compare(sB) <= 0);
+					return (sA.compare(sB) < 0);
 				}
 			}
 			return false;