[drag&drop] admission phases, handle deleting and creating positioning
Merge branch 'refactor_admissions' of git://github.com/absolu7/GAKUEngine into refactor_admissions

Conflicts:
	admissions/app/views/gaku/admin/admission_methods/admission_phases/_form_fields.html.slim
[fix] conflict for admission phases form fields
[drag&drop] position refresh on exam portion delete
Merge remote-tracking branch 'tapalilov/refactor_admissions'