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
Yup - the whole S3OptionsFilter JS is crap from the top to the bottom. It makes assumptions, tries to be intelligent and doesn't really draw any logical conclusions. I need to rewrite this.
Meanwhile maybe you want to look into more critical things for your project than fancy GUI tricks?