Add modal for edit_view

Update bootstrap, jquery, select2-bootstrap, moment.js, datepicker

Italian translation improvements - by Pierlauro Sciarelli

default datetime picker's time to current time when field is blank

Allow primary keys with special characters in editable list view

allow primary keys with special characters in editable list view and add tests for it, also remove unnecessary db.create_all() in other tests

comment position is wrong

Add an argument to FileUploadField to disallow overwriting existing f…