request #7462: AgileDashboard milestones display rules are not taken into account for non last level milestones

Change-Id: Id6eb99a1d0b74116b3376f8780f9506de96f85d4
request #7461 SQL injection on docman global search

Change-Id: Ib7e6c9d312ff531834ba0b2fc32ec8e1b1da257d
request #6909: Fix the list of submilestone trackers for a milestone.

Change-Id: I2f458514437c9c41146caa6c21953efa17768576
Tuleap 7.5-2

Change-Id: I7e491f14deb7cfed10f4376d2de63fa75ce41c4b