refactor: write lastVisited and query at the same time

In addition, the `settings.write` method now uses shallow merge by default

src/node/app/vscode.ts

@@ -183,14 +183,9 @@ export class VscodeHttpProvider extends HttpProvider {
       }),
     ])
 
-    let promise = Promise.resolve()
-    if (startPath) {
-      promise = settings.write({ lastVisited: startPath })
-    }
-    // `settings.write` depends on `settings.read` internally. To avoid race conditions, a promise is added here to synchronize.
-    promise.then(() => {
-      // the query should not be extends, but should be replaced directly.
-      settings.write({ query: route.query }, true)
+    settings.write({
+      lastVisited: startPath || lastVisited, // If startpath is undefined, then fallback to lastVisited
+      query: route.query,
     })
 
     if (!this.isDev) {

src/node/settings.ts

@@ -30,9 +30,9 @@ export class SettingsProvider<T> {
 
   /**
    * Write settings combined with current settings. On failure log a warning.
-   * Objects will be merged and everything else will be replaced.
+   * Settings can be shallow or deep merged.
    */
-  public async write(settings: Partial<T>, shallow?: boolean): Promise<void> {
+  public async write(settings: Partial<T>, shallow = true): Promise<void> {
     try {
       const oldSettings = await this.read()
       const nextSettings = shallow ? Object.assign({}, oldSettings, settings) : extend(oldSettings, settings)