use Html::autocompletionTextField

Replace a homemade text <input /> field with
Html::autocompletionTextField()

This was a task name with a ' character is correctly displayed.

with Html::autocompletionTextField():
  John's task
Without:
  John (the ' is seen as the end of the value='')

thanks Walid Nouh for the help.
Merge branch 'glpi0.83' of git+ssh://forge.fusioninventory.org/git/fusioninventory/fusioninventory-for-glpi into glpi0.83