Make keytab description non-editable in the keyboard tab

Note, this doesn't mean the description can't be edited. It just can't
be changed in that UI.

Thanks to Yichao Yu for the spotting and the patch.

REVIEW: 107289

src/EditProfileDialog.cpp

@@ -550,6 +550,7 @@ void EditProfileDialog::updateKeyBindingsList(bool selectCurrentTranslator)
         const KeyboardTranslator* translator = keyManager->findTranslator(translatorName);
 
         QStandardItem* item = new QStandardItem(translator->description());
+        item->setEditable(false);
         item->setData(QVariant::fromValue(translator), Qt::UserRole + 1);
         item->setIcon(KIcon("preferences-desktop-keyboard"));