Show password indicator and masked password field for encrypted sends

- Add password and authType fields to Send type
- Show lock icon in send list for password-protected sends
- Display masked dots in password field when editing a send that has a password set
- Add Remove button to clear existing password

webapp/src/styles/vault.css

@@ -1269,3 +1269,8 @@ select.input.duplicate-mode-toolbar-select {
   @apply text-sm;
   color: var(--danger);
 }
+
+.inline-icon {
+  display: inline;
+  vertical-align: middle;
+}