Renames methods for clarity

Author: eamodio

src/webviews/apps/plus/timeline/timeline.ts

@@ -32,7 +32,7 @@ export class GlTimelineApp extends GlApp<State> {
 		return new TimelineStateProvider(this, state, ipc);
 	}
 	protected override onPersistState(state: State): void {
-		this._ipc.setState({ period: state.period, uri: state.uri });
+		this._ipc.setPersistedState({ period: state.period, uri: state.uri });
 	}
 
 	override connectedCallback(): void {

src/webviews/apps/shared/ipc.ts

@@ -165,10 +165,21 @@ export class HostIpc implements Disposable {
 		return promise;
 	}
 
-	setState<T>(state: Partial<T>): void {
+	setPersistedState<T>(state: Partial<T>): void {
 		this._api.setState(state);
 	}
 
+	updatePersistedState<T>(update: Partial<T>): void {
+		let state = this._api.getState() as Partial<T> | undefined;
+		if (state != null && typeof state === 'object') {
+			state = { ...state, ...update };
+			this._api.setState(state);
+		} else {
+			state = update;
+		}
+		this.setPersistedState(state);
+	}
+
 	@debug<HostIpc['postMessage']>({ args: { 0: e => `${e.id}, method=${e.method}` } })
 	private postMessage(e: IpcMessage) {
 		this._api.postMessage(e);