Feature/preselect account in create or update activity dialog (#3413)

* Preselect account if there is only one

* Update changelog

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Improved the usability of the create or update activity dialog by preselecting the (only) account
 - Improved the usability of the date range selector in the assistant
 - Refactored the holding detail dialog to a standalone component
 - Refreshed the cryptocurrencies list

apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.component.ts

@@ -91,7 +91,12 @@ export class CreateOrUpdateActivityDialog implements OnDestroy {
     });
 
     this.activityForm = this.formBuilder.group({
-      accountId: [this.data.activity?.accountId, Validators.required],
+      accountId: [
+        this.data.accounts.length === 1 && !this.data.activity?.accountId
+          ? this.data.accounts[0].id
+          : this.data.activity?.accountId,
+        Validators.required
+      ],
       assetClass: [this.data.activity?.SymbolProfile?.assetClass],
       assetSubClass: [this.data.activity?.SymbolProfile?.assetSubClass],
       comment: [this.data.activity?.comment],