Enhancement: Files sort order

[karlmikaelskar]

Expected behaviour

Clicking column names "Name", "Size" and "Modification Date" should sort the list asc/desc

Actual behaviour

Nothing (as expected)

Steps to reproduce

Server configuration

Operating system: Ubuntu 12.04

Web server: Apache 2.2

Database: Mysql

PHP version:

ownCloud version: 5.0.6

Client configuration

Browser: Safari 6.0.5

Operating system: OS X 10.8.4

Logs

Web server error log

Insert your webserver log here

ownCloud log (data/owncloud.log)

Insert your ownCloud log here

Browser log

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log 
c) ...

[MorrisJobke]

Dup of #164