Improve the error message when registering with oversized team

[jtojnar]

We need to add information about limits to the validators

entries/app/forms/TeamFormFactory.php

Line 61 in e9d743c

}, 'messages.team.error.too_many_members_simple'); // TODO: add params like in add/remove buttons

just like we have them in add/remove buttons:

entries/app/forms/TeamFormFactory.php

Line 85 in e9d743c

$button->form->addError(Html::el()->setText($this->translator->translate('messages.team.error.too_many_members', $maxMembers, ['category' => $category])));

Depends on nette/forms#218