nav bar, removed 'new application' link

due to lack of space since there is the new menu point sick notes

refs #9469
sick note, added validation

refs #9469
nav bar, changed order of menu points

refs #9469
sick note form, changed url of cancel button

refs #9469
sick note entity, removed field aubPresentedDate

refs #9469
sick note, added detail page

refs #9469
sick note, separated sick note form from comments

refs #9469
nav bar, changed icon for sick note menu point

refs #9469