logic: handled case when selected project location can not be written (issue #735) (#906)

src/lib/utility/ConfigManager.cpp

@@ -375,10 +375,10 @@ bool ConfigManager::load(const std::shared_ptr<TextAccess> textAccess)
 	return true;
 }
 
-void ConfigManager::save(const std::string filepath)
+bool ConfigManager::save(const std::string filepath)
 {
 	std::string output("");
-	createXmlDocument(true, filepath, output);
+	return createXmlDocument(true, filepath, output);
 }
 
 void ConfigManager::setWarnOnEmptyKey(bool warnOnEmptyKey) const

src/lib/utility/ConfigManager.h

@@ -59,7 +59,7 @@ public:
 	std::vector<std::string> getSublevelKeys(const std::string& key) const;
 
 	bool load(const std::shared_ptr<TextAccess> textAccess);
-	void save(const std::string filepath);
+	bool save(const std::string filepath);
 	std::string toString();
 
 	void setWarnOnEmptyKey(bool warnOnEmptyKey) const;