locig: refresh after edit project

* implemented saving project settings force-refreshes the project if something has changed.
* when nothing has changed while editing the project settings, the project is not refreshed anymore.
* new project window is cleared now before it is displayed.

src/lib/utility/messaging/type/MessageLoadProject.h

@@ -6,8 +6,9 @@
 class MessageLoadProject: public Message<MessageLoadProject>
 {
 public:
-	MessageLoadProject(const std::string& filePath)
+	MessageLoadProject(const std::string& filePath, bool forceRefresh)
 		: projectSettingsFilePath(filePath)
+		, forceRefresh(forceRefresh)
 	{
 	}
 
@@ -18,10 +19,11 @@ public:
 
 	virtual void print(std::ostream& os) const
 	{
-		os << projectSettingsFilePath;
+		os << projectSettingsFilePath << ", forceRefresh: " << std::boolalpha << forceRefresh;
 	}
 
 	const std::string projectSettingsFilePath;
+	const bool forceRefresh;
 };
 
 #endif // MESSAGE_LOAD_PROJECT_H

src/lib/utility/utility.h

@@ -1,6 +1,7 @@
 #ifndef UTILITY_H
 #define UTILITY_H
 
+#include <algorithm>
 #include <deque>
 #include <set>
 #include <time.h>
@@ -35,6 +36,12 @@ namespace utility
 	template<typename T>
 	std::vector<std::string> toStrings(const std::vector<T>& d);
 
+	template<typename T>
+	bool isPermutation(const std::vector<T>& a, const std::vector<T>& b)
+	{
+		return std::is_permutation(a.begin(), a.end(), b.begin());
+	}
+
 	bool intersectionPoint(Vec2f a1, Vec2f b1, Vec2f a2, Vec2f b2, Vec2f* i);
 
 	size_t digits(size_t n);