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/window/QtTextEditDialog.cpp

@@ -25,6 +25,16 @@ std::string QtTextEditDialog::getText()
 	return m_text->toPlainText().toStdString();
 }
 
+void QtTextEditDialog::setWText(const std::wstring& text)
+{
+	m_text->setPlainText(QString::fromStdWString(text));
+}
+
+std::wstring QtTextEditDialog::getWText()
+{
+	return m_text->toPlainText().toStdWString();
+}
+
 void QtTextEditDialog::setReadOnly(bool readOnly)
 {
 	m_text->setReadOnly(readOnly);