Issue #1161 - Display tooltip below form fields on Create plan page. ...

- Required modification for the intiialization of Bootstrap tooltips in the javascript file
      /utils/tooltipHelper.js. The default behaviour is placement of tooltip to the right of element
      with attribute data-toggle='tooltip'. Now if the attribute data-placement attribute is set,
      then the placement of the tootip will be as specfied in the attribute and not on the right (the default behaviour).
    - The accessible combob-box now takes an optional property 'placement' which if present sets data-placement
      attribute to the value of the placement property.
    - Now all Create Plan page tooltips are below the input as requested.

Fix for #1161.

Update asset structure with webpacker gem