fixes menu link missing navbar-nav

Adds Leaflet Search to Map

add navbar-nav class to ul tag when create menu link use bootstrap3

Adds leaflet search to maps

Examples

Merge branch 'upstream-edit-after-create' of https://github.com/Code4SA/flask-admin into Code4SA-upstream-edit-after-create

Make 'contains' the default string filter operator

Update filters.py

[fix] ListField validation

missed a comma, sorry

add trove classifiers to setup.py

will make it so https://caniusepython3.com stops showing this as a blocker

based on the versions currently tested in Travis

FileUploadInput fix

Added after_model_delete hook on view classes like after_model_change

If you edit a model where file field is required you will get a validation error if file field is set but wasn't changed.
You should pass filename in form data if it is already set.

fix mapbox-v4