Simplify implementing CSRF validation by adding SecureForm

Add customization options for export columns

For some reason the blueprints aren't included when I run the tests
locally.

This is based on what is done by
`get_details_columns`/`column_details_list`/`column_details_exclude_list`
with the added complication that `get_export_columns` also checks
`column_list` before attempting to invoke `scaffold_list_columns`.

Fix form_rules rendering in modal dialogs

Closes #1033 - pass on form_extra_fields while scaffolding an inline …

Prevent users from loading modal templates when modals are disabled

File-admin - combine mkdir, rename, edit, and upload templates

Implement CSV export for BaseModelView.

add a way to add multiple views or links with a single line of code

Fix boolean filters in peewee

Docs: Use inaccessible_callback