Better logic in the checkReciepientsKeys()

Author: IvanPizhenko

extension/chrome/elements/compose-modules/compose-recipients-module.ts

@@ -805,8 +805,11 @@ export class ComposeRecipientsModule extends ViewModule<ComposeView> {
       const email = $(recipientEl).text().trim();
       const dbContacts = await ContactStore.get(undefined, [email]);
       if (dbContacts) {
-        recipientEl.element.classList.remove('no_pgp');
-        await this.renderPubkeyResult(recipientEl, dbContacts as Contact[]);
+        const realDbContacts = dbContacts.filter(contact => contact !== undefined);
+        if (realDbContacts && realDbContacts.length) {
+          recipientEl.element.classList.remove('no_pgp');
+          await this.renderPubkeyResult(recipientEl, realDbContacts as Contact[]);
+        }
       }
     }
   }