convert consultation creator to vue and fix several problems, fixes #3349

app/controllers/consultation/admin.php

app/controllers/consultation/consultation_controller.php

app/controllers/consultation/overview.php

app/views/consultation/admin/create.php

app/views/consultation/admin/edit.php

app/views/consultation/admin/index.php

app/views/consultation/admin/ungrouped.php

app/views/consultation/overview/ungrouped.php

...grations/6.0.7_add_consecutive_flag_for_consultations.php

lib/classes/JsonApi/RouteMap.php

...lasses/JsonApi/Routes/Consultations/SlotCreationCount.php

lib/models/ConsultationBlock.php

lib/models/ConsultationSlot.php

resources/assets/javascripts/bootstrap/vue.js

resources/assets/javascripts/lib/RestrictedDatesHelper.ts

resources/assets/javascripts/studip-ui.js

resources/assets/stylesheets/scss/forms.scss

resources/vue/components/ConsultationCreator.vue

resources/vue/components/Datepicker.vue

resources/vue/components/StudipTooltipIcon.vue