[Delivers #35775219] Generate tooltips for field labels from i18n

I've only added one example entry to the I18n file... tooltip text yet to be provided.

Notes:
- use bootstrap's tooltip js plugin to display hover text for field labels
- tooltip text is pulled from the locales file and entries are suffixed with "_tooltip" e.g. 
accession:
  title: Title
  title_tooltip: The title of the accession

- also added ability to add a placeholder via the locales file (the placeholder will show for text fields in browsers that support the 'placeholder' attribute) e.g.
accession:
  title: Title
  title_placeholder: e.g. This from my garage.

- also a few scoping tweaks for the utils.js initialisers