tasks #6713: No more have radio button in tracker settings form

 * Click directly in color
 * A white icon-ok is displayed on selected color
 * IE7 compatibility (fix a JS issue)
 * Use pointer for cursor

Change-Id: Icf9fe1e65708fed9041c82aef2628d7088117b32
tasks #6704: Display a live preview when selection a new tracker color

Change-Id: I8caea272f6690b91ad062a531f4825a1c7cb52db
Merge commit 'refs/changes/05/2305/5' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6713: No more have radio button in tracker settings form
This is Tuleap 6.12.99.53

Change-Id: I4dd76cfd6fc0313099918b312709eca702e5b032
Merge commit 'refs/changes/10/2310/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6704: Display a live preview when selection a new tracker color
This is Tuleap 6.12.99.54

Change-Id: Idb927256feb8540ca8a4c1268726d531381ef3a1