logic: more wstring usages

* removed header paths from VS Project setup message since VS doesn't send these anymore
* implemented using wstring in IDE communication
* fixed retrieving filepaths from QtDirectoryListbox that contain special characters
* use wstring for source extensions
* added special character as file extension to FileManagerTestSuite

src/lib_gui/qt/network/QtIDECommunicationController.h

@@ -23,7 +23,7 @@ public:
 	virtual bool isListening() const;
 
 private:
-	virtual void sendMessage(const std::string& message) const;
+	virtual void sendMessage(const std::wstring& message) const;
 
 	QtTcpWrapper m_tcpWrapper;