show an error if trying to save a contact without an account set (last field)

app/src/main/kotlin/com/simplemobiletools/contacts/activities/ContactActivity.kt

@@ -502,6 +502,11 @@ class ContactActivity : SimpleActivity() {
             return
         }
 
+        if (contact_source.value.isEmpty()) {
+            toast(R.string.missing_contact_account)
+            return
+        }
+
         contact!!.apply {
             val oldPhotoUri = photoUri
 

app/src/main/res/values-de/strings.xml

@@ -4,6 +4,7 @@
     <string name="address">Adresse</string>
     <string name="inserting">Einfügen…</string>
     <string name="updating">Aktualisiere…</string>
+    <string name="missing_contact_account">Please select an account to which the contact belongs</string>
 
     <string name="new_contact">Neuer Kontakt</string>
     <string name="edit_contact">Kontakt bearbeiten</string>

app/src/main/res/values-ko-rKR/strings.xml

@@ -4,6 +4,7 @@
     <string name="address">주소</string>
     <string name="inserting">Inserting…</string>
     <string name="updating">Updating…</string>
+    <string name="missing_contact_source">Please select an account to which the contact belongs</string>
 
     <string name="new_contact">새로운 연락처</string>
     <string name="edit_contact">연락처 수정</string>

app/src/main/res/values-pt/strings.xml

@@ -4,6 +4,7 @@
     <string name="address">Address</string>
     <string name="inserting">Inserting…</string>
     <string name="updating">Updating…</string>
+    <string name="missing_contact_source">Please select an account to which the contact belongs</string>
 
     <string name="new_contact">Novo contacto</string>
     <string name="edit_contact">Editar contacto</string>

app/src/main/res/values-ru/strings.xml

@@ -4,6 +4,7 @@
     <string name="address">Адрес</string>
     <string name="inserting">Добавление…</string>
     <string name="updating">Обновление…</string>
+    <string name="missing_contact_source">Please select an account to which the contact belongs</string>
 
     <string name="new_contact">Новый контакт</string>
     <string name="edit_contact">Редактировать контакт</string>

app/src/main/res/values-sk/strings.xml

@@ -4,6 +4,7 @@
     <string name="address">Adresa</string>
     <string name="inserting">Vytvára sa…</string>
     <string name="updating">Upravuje sa…</string>
+    <string name="missing_contact_source">Prosím zvoľte účet, ktorému patrí daný kontakt</string>
 
     <string name="new_contact">Nový kontakt</string>
     <string name="edit_contact">Upraviť kontakt</string>

app/src/main/res/values/strings.xml

@@ -4,6 +4,7 @@
     <string name="address">Address</string>
     <string name="inserting">Inserting…</string>
     <string name="updating">Updating…</string>
+    <string name="missing_contact_account">Please select an account to which the contact belongs</string>
 
     <string name="new_contact">New contact</string>
     <string name="edit_contact">Edit contact</string>