fix: don't set query if there already is one (microsoft#201027)

Don't set query if there already is one

Fixes microsoft#200085

Author: rzhao271

src/vs/workbench/contrib/preferences/browser/settingsEditor2.ts

@@ -407,7 +407,9 @@ export class SettingsEditor2 extends EditorPane {
 			const settingsTarget = cachedState.target;
 			this.settingsTargetsWidget.settingsTarget = settingsTarget;
 			this.viewState.settingsTarget = settingsTarget;
-			this.searchWidget.setValue(cachedState.searchQuery);
+			if (!this.searchWidget.getValue()) {
+				this.searchWidget.setValue(cachedState.searchQuery);
+			}
 		}
 
 		if (this.input) {