ImpressPages 4.6.4

4.6.4 brings a bunch of fixes and improvements:

• application/json response in json files instead of text/json  #748
• Japanese admin translations
• Remove unnecesary title in Admin -> Pages section when list style type is used.
• "path" setting in GRID field of RespositoryFile type
• Fixed search functionality of Checkboxes GRID field
• support of email addresses with new domain names
• Fixed photo gallery settings submit bug #757 (thanks to Aurelijus)
• Fixed record ordering in Admin -> System -> Email log page