[FIX] typo in odoo.py

Fixes #4203
[IMP] mail : add compose mail button on top menu to send private emails
[FIX] number of blogs by month according to blog/tags
[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

[IMP]make invisible instead of remove