PROJ-151: Modal window for every possible admin page
Merge branch 'develop' of github.com:Inovitex/fcms into develop

Conflicts:
	app/views/admin/cities/_form.html.erb
	app/views/admin/composers/_form.html.erb
	app/views/admin/editions/_form.html.erb
	app/views/admin/instruments/_form.html.erb
	app/views/admin/pieces/_form.html.erb
	app/views/admin/schoolboards/_form.html.erb
	app/views/admin/schools/_form.html.erb
	app/views/admin/schooltypes/_form.html.erb
	app/views/admin/users/_form.html.erb
GJ mergetool, you failed at your only job -> Merging