Form to save a new article is broken with Google Chrome

[nicosomb]

Issue details

With Chrome 50, the form to save a new link is broken.

screenshot on Chrome

See how it should be (it works with Firefox)

Environment

• wallabag version (or git revision) that exhibits the issue: 2.0.3
• How did you install wallabag? Via git clone
• Last wallabag version that did not exhibit the issue (if applicable): don't know
• php version: 7.0.7
• OS: Mac OS
• type of hosting (shared or dedicated): localhost and http://v2.wallabag.org/
• which storage system you choose at install (SQLite, MySQL/MariaDB or PostgreSQL): SQLite

Steps to reproduce/test case

• Access to http://v2.wallabag.org/ with Chrome
• Try to save a new link