refactor(patch-db): use PatchDB class declaratively (#1562)

* refactor(patch-db): use PatchDB class declaratively

* chore: remove initial source before init

* chore: show spinner

* fix: show Connecting to Embassy spinner until first connection

* fix: switching marketplaces

* allow for subscription to end with take when installing a package

* update patchdb

Co-authored-by: Lucy Cifferello <12953208+elvece@users.noreply.github.com>

frontend/projects/ui/src/app/components/app-wizard/wizard-defs.ts

@@ -6,7 +6,6 @@ import { ApiService } from '../../services/api/embassy-api.service'
 import { AppWizardComponent, SlideDefinition } from './app-wizard.component'
 import { ConfigService } from 'src/app/services/config.service'
 import { MarketplaceService } from 'src/app/services/marketplace.service'
-import { first } from 'rxjs/operators'
 
 @Injectable({ providedIn: 'root' })
 export class WizardDefs {
@@ -45,7 +44,6 @@ export class WizardDefs {
                 id,
                 'version-spec': version ? `=${version}` : undefined,
               })
-              .pipe(first())
               .toPromise(),
         },
       },
@@ -87,7 +85,6 @@ export class WizardDefs {
                 id,
                 'version-spec': version ? `=${version}` : undefined,
               })
-              .pipe(first())
               .toPromise(),
         },
       },