Fine-grained restriction of widget elements to translate

Use `noi18n_text` to not have the text translated, `noi18n_tooltip` for
the tooltip, respectively. Old comment `noi18n` continues to block all
elements.
Do not translate hotkey action names

Their tooltips explain the purpose quite well, and the text itself is
supposed to have some relation to the key in player settings.
Translation update: Interface (Templates)