Add custom title config.json option

References: https://todo.sr.ht/~emersion/gamja/112

README.md

@@ -106,7 +106,9 @@ gamja default settings can be set using a `config.json` file at the root:
 		// disable. Enabling PINGs can have an impact on client power usage and
 		// should only be enabled if necessary.
 		"ping": 60
-	}
+	},
+	// Custom title (string).
+	"title": "gamja IRC client"
 }
 ```
 

components/app.js

@@ -192,6 +192,10 @@ export default class App extends Component {
 	handleConfig(config) {
 		this.setState({ loading: false });
 
+		if (typeof config.title === "string") {
+			document.title = config.title;
+		}
+
 		let connectParams = { ...this.state.connectParams };
 
 		if (config.server) {