Migrate Add Database Panel to React (#597)

Co-authored-by: Steve Faulkner <southpolesteve@gmail.com>

src/Explorer/SplashScreen/SplashScreen.tsx

@@ -292,7 +292,7 @@ export class SplashScreen extends React.Component<SplashScreenProps> {
         iconSrc: AddDatabaseIcon,
         title: this.container.addDatabaseText(),
         description: null,
-        onClick: () => this.container.addDatabasePane.open(),
+        onClick: () => this.container.openAddDatabasePane(),
       });
     }