[MERGE] forward port of branch 8.0 up to c41109f
[FIX] Add missings files from previous forward port.
[FIX]issues in event

[IMP]improved reporting and android tip

[IMP]remove event's ticket form menu from customize menu on website

[IMP]improved code
[IMP]set 0 as unlimited and set unlimited tickets on website

[IMP]test case set event as limited.
[IMP]on tickets 0 as unlimited, remove depedency on registration tab limited and unlimited.

[IMP]improve the order now button