ui: sorting search results

* search results are sorted by: score > length > name
* fixed crash that occurred when trying to get a node by id with id == 0

src/lib/utility/utilityString.cpp

@@ -133,6 +133,22 @@ namespace utility
 		return text.size() >= postfix.size() && text.rfind(postfix) == (text.size() - postfix.size());
 	}
 
+	std::string switchCases(std::string s)
+	{
+		for (char& c: s)
+		{
+			if (islower(c))
+			{
+				c = toupper(c);
+			}
+			else if (isupper(c))
+			{
+				c = tolower(c);
+			}
+		}
+		return s;
+	}
+
 	std::string toUpperCase(const std::string& in)
 	{
 		std::string out;

src/lib/utility/utilityString.h

@@ -37,6 +37,7 @@ namespace utility
 	bool isPrefix(const std::string& prefix, const std::string& text);
 	bool isPostfix(const std::string& postfix, const std::string& text);
 
+	std::string switchCases(std::string s);
 	std::string toUpperCase(const std::string& in);
 	std::string toLowerCase(const std::string& in);
 	bool equalsCaseInsensitive(const std::string& a, const std::string& b);