hide apply button if no filters

If you create new filters, then delete all of them, apply button will not hide
also hide reset filters button
Add varchar to prevent unsupported filter error
Merge pull request #577 from pawl/master

Add varchar to prevent unsupported filter error
Minor typo fixes related to #570
Merge pull request #571 from Raz0r/patch-4

hide apply button if no filters
fix substring typo
escape data before being used in query

dangerous!
Merge pull request #581 from Raz0r/patch-5

fix parse_like_term() for pymongo
Update quickstart.rst

- fix sentence structure
Merge pull request #583 from cbess/patch-1

Update quickstart.rst
Fixed a typo in 'base.html' template
Merge pull request #589 from silme-ea/error-typo

Fixed a typo in 'base.html' template
Fixed mass-check
Merge branch 'master' of github.com:mrjoes/flask-admin
Configurable column width for bootstrap 3
Fixed double view wrapping causing _handle_view to be called more than one time
Fixed #435. Support searching through intermediate relations
Fixed #556 Added support for complex sortables
Merge remote-tracking branch 'remotes/upstream/master'