patients: big refactoring "breadcrumbs"

remove patients tabs, patient visit tabs
add selects for studies, studyDesigns, patients, visits and questionnaires; filter based on selection
show patients table if multiple patients, show patient if one is selected
show patient based on Session.selectedPatientId
show visit based on Session.selectedDesignVisitId <- allows to switch patients 👍
init visit in patient_visit.coffee based on Session.selectedDesignVisitId
add safety check to initVisit method
publish (all) studyDesigns; subscribe on patients
subscribe to therapists on patients
add package bootstrap-select