Removing projects field from component view and filtering the activities...

... and milestones by project when creating task from component view + bugfix

* When creating task from a project, project field should not show and the activities, milestones should be filtered list for that project.
* bugfix in change_password
And for not adding it, this should check whether you're in the project controller (request.function=="project") and then /not/ add it, instead of adding it when you detect that you are in the task controller.