store project settings content when opening database

This is required to tell Sourcetrail that the database content is up to date with the current project settings.

core/include/DatabaseStorage.h

@@ -51,6 +51,8 @@ namespace sourcetrail
 		void setupDatabase();
 		void clearDatabase();
 
+		void setProjectSettingsText(const std::string& text);
+
 		bool isEmpty() const;
 		bool isCompatible() const;
 		int getLoadedDatabaseVersion() const;

core/include/SourcetrailDBWriter.h

@@ -94,6 +94,7 @@ namespace sourcetrail
 		void setupDatabaseTables();
 		void clearDatabaseTables();
 		void createOrResetProjectFile();
+		void updateProjectSettingsText();
 		int addNodeHierarchy(const NameHierarchy& nameHierarchy);
 		int addFile(const std::string& filePath);
 		int addEdge(int sourceId, int targetId, EdgeKind edgeKind);