user making timesheet into timesheet pages.
NEW: Can enter start hours of task when creating timesheet

Fix bad merge

a limit to avoid problem with very large database.

main page).
- New: Can search on project ref or string from project main page (like
other main page).

Fix variable date property name, to be compliant with varaible naming
convention (create)
Add feature to shift task date when change project start date (option)
Add project start/end date on Project->Task View

Fix: delete obsolete action