A proposal to fix https://github.com/mrjoes/flask-admin/issues/532

From the issue:

If an image extension is 'jpeg' (not 'jpg'), then inside
ImageUploadField._save_file() the call to self._get_save_format() enters
the if-statement where the filename is changed to ${name}.jpg. The
format stays unchanged, though, because it's the same 'JPEG'. As a
result, the original filename is preserved on disk, which is
${name}.jpeg, but _save_file() returns ${name}.jpg.

self._save_thumbnail(data, filename, format) saves the thumbnail file
under ${name}_thumb.jpg

At the time when ImageUploadField._save_file() is finished, two files
are created:

${name}.jpeg
${name}_thumb.jpg
Would you consider changing

def _save_file(self, data, filename):
...
data.save(path)

to
data.save( self._get_path(filename) )

In that case the original image will be saved with the updated filename
after self._get_save_format(filename, self.image)

Check hidden fields for widget type instead of specific class

Added datepicker.css to the base template's head

New url scheme for modelview

Dependencies distutils testing

Properly enclose 'model' in quotes when testing p.[attr]

This reverts commit 323405e6, reversing
changes made to 41a68dde.

SQL alchemy Unique validator allows multiple None values

Fix search input margin

Fix 'TypeError: descriptor 'lower' requires a 'str' object but received a 'unicode''

Fix small typo