request #6350: Add info message to warn about IE9 and IE7

Change-Id: I6ecec603fe15774b7bf98c5b0db2da6cc95c1026
Merge commit 'refs/changes/23/2023/4' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #6350: Add info message to warn about IE9 and IE7

Conflicts:
	src/common/autoload.php
This is Tuleap 6.10.99.65

Change-Id: I7bd45bbec2993781b15110e72219f2230b284685