[IMP] web: keyboard navigation in form view

    1. Added the ability to navigate within the List view using UP and
        DOWN keys.
    2. By defaults, the focus should be set on the search input field.
    3. From the search input field, using the DOWN key, the focus goes
        to the list
    4. From the search input field, using TAB key, the focus goes to the
        create button
    5. From the create/import buttons, using TAB or DOWN key goes to the
        first row of the list, then UP and DOWN keys moves the focus from
        item to item in the list.
    6. When on a row, hitting ENTER opens the view of that row.

Also in this commit
    1. When on the first row, hitting the UP key does nothing
    2. When on the last row, hitting the DOWN key does nothing

Not included in this commit
    1. Memorize the position on the list when opening an row, than
        restoring when going back to that list
    2. Navigation on grouped list using the keyboard