bitbake: toaster: Base table fixes for header text, sort icon and filter icon

bitbake: toaster: Base table fixes for header text, sort icon and filter icon

- Display the table column header as a link only if it is sortable.
   Non-sortable column headers are displayed as plain text.

- Display the sort order by an up / down arrow icon next to the
   column header

- Add style for header in default.css

- Set tooltip for the active filter icon

- Pass the view name to the filter dialog

(Bitbake rev: 53ede15926d45b555252d77919a0568a984c6d74)

Signed-off-by: Ravi Chintakunta <ravi.chintakunta@timesys.com>
Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>