From upstream Release Notes:

Welcome to phpMyAdmin 4.6.0, a regular maintenance release including over 60 new features and bug fixes. Please note that this release ends support for old versions of Microsoft Internet Explorer, which are no longer supported by Microsoft. There is a new configuration directive, $cfg['Servers'][$i]['ssl_verify'] which is useful in some cases with self-signed certificates. The ForceSSL and PmaAbsoluteUri configuration directives have been removed (the functions of both of these should better be handled by the webserver than the application).

A complete list of new features and bugs that have been fixed is available in the ChangeLog file or changelog.php included with this release.

A few highlights:

• Allow setting routine-wise privileges
• UI for defining partitioning in create table window
• Support JSON data type
• Editing partitions in table Structure
• Copy results to clipboard
• Reactivate cut&paste possibility in print view
• Display binary strings as text if they are valid UTF-8
• Copy multiple tables to database
• Show MySQL error messages in user language
• Add new configuration directive 'ssl_verify' for self-signed certificates with mysqlnd and PHP >=5.6
• Remove ForceSSL and PmaAbsoluteUri configuration directives (these are better handled by proper webserver configuration)
• Fixed several bugs relating to exporting, particularly with DEFAULT and COMMENT fields

There are many more improvements; please refer to the ChangeLog for full details.