Add missing class_name to bootstrap 2/3 menu items

This is part of the code, but wasn't in the template.

https://github.com/flask-admin/flask-admin/blob/v1.5.2/flask_admin/menu.py#L133

Error in Ukrainian translate 

Change Ukrainian translate error

Upgrade leaflet

Add file-admin based on Azure Blob Storage

Currently the unit tests for file-admin are tied to the local
implementation. However, all other implementations of the file-admin
(e..g S3) should maintain the same invariants as the local one. As such,
this change makes it easier to copy the local file-admin tests for other
storage backends.

remove need for some inline javascripts

Fix sorting in subdirectories in fileadmin

Update app.py

check for valid scheme in the redirect target url (prevent xss)

Fixing ajax casting

fix doc import error in advanced.rst

Ask before removing Inline list items (inline-remove-field class)

remove useless brackets

Fix error in GeoAlchemy example readme

Fix typo in templating example

fileadmin - fix timestamp bug windows