Refactor in SyntaxDefinition and related classes.

Minor improvements in CPP, CSS, xit syntax highlighting.
AI Assistant / LLM Chat now can restore previous opened chats and states (last model used, panel split), can have private conversations, can clone a previous conversation, plus some visual improvements.
Fixed a bug in tab widget splitting.

src/tools/ecode/appconfig.cpp

@@ -223,11 +223,12 @@ void AppConfig::load( const std::string& confPath, std::string& keybindingsPath,
 							   "git" == creator.first || "debugger" == creator.first ||
 							   "aiassistant" == creator.first );
 	}
-	pluginManager->setPluginsEnabled( pluginsEnabled, sync );
 
 	languagesExtensions.priorities = ini.getKeyMap( "languages_extensions" );
 
 	iniInfo = FileInfo( ini.path() );
+
+	pluginManager->setPluginsEnabled( pluginsEnabled, sync );
 }
 
 void AppConfig::save( const std::vector<std::string>& recentFiles,
@@ -372,6 +373,8 @@ void AppConfig::save( const std::vector<std::string>& recentFiles,
 	for ( const auto& langExt : languagesExtensions.priorities )
 		ini.setValue( "languages_extensions", langExt.first, langExt.second );
 
+	pluginManager->forEachPlugin( [this]( Plugin* plugin ) { plugin->onSaveState( &iniState ); } );
+
 	ini.writeFile();
 	iniState.writeFile();
 }