tasks #6616: change sort icons

+ tasks #6607: extract table reports options into dedicated buttons

add/remove column will be done in a next step

Change-Id: Ifa97cb62823756611bdfc4b0871713ba4f506641
request #6641: Fix X-PAGINATION-SIZE for /trackers/:id/artifacts

Change-Id: Ie7a2db9bde61fcd9a32b6f18d7f15964cb3f3efb
Merge commit 'refs/changes/54/2254/4' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6616: change sort icons
This is Tuleap 6.12.99.21

Change-Id: I204d281e8d98e458533201bafc3f1d5567451a3c
Merge commit 'refs/changes/58/2258/2' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #6641: Fix X-PAGINATION-SIZE for /trackers/:id/artifacts
This is Tuleap 6.12.99.22

Change-Id: Id290b422c5a639f2a39c5d07307ce3c42799c956