Default to order search results by '-modified'
Default to order search results by '-modified'

This will make searches better.  Most of the time you want recent results, not
oldest ones.

Author: Isaac Levy <ilevy@chromium.org>

Review: https://codereview.appspot.com/6814091/

v3ss0n/rietveld,andyzsf/rietveld,gco/rietveld,gco/rietveld,dushmis/rietveld,aungzanbaw/rietveld,draem0507/rietveld,draem0507/rietveld,salomon1184/rietveld,DeanHere/rietveld,arg0/rietveld,dushmis/rietveld,ericmckean/rietveld,openlabs/cr.openlabs.co.in,sajingeo/rietveld,DeanHere/rietveld,foolonhill/rietveld,draem0507/rietveld,foolonhill/rietveld,kscharding/integral-solutions-smxq,sajingeo/rietveld,kscharding/integral-solutions-smxq,arg0/rietveld,rietveld-codereview/rietveld,salomon1184/rietveld,fuzan/rietveld,dushmis/rietveld,xtypebee/rietveld,google-code-export/rietveld,DeanHere/rietveld,fuzan/rietveld,v3ss0n/rietveld,berkus/rietveld,Koulio/rietveld,xtypebee/rietveld,arg0/rietveld,sajingeo/rietveld,berkus/rietveld,kscharding/integral-solutions-smxq,aungzanbaw/rietveld,robfig/rietveld,foolonhill/rietveld,rietveld-codereview/rietveld,salomon1184/rietveld,gavioto/rietveld,andyzsf/rietveld,Koulio/rietveld,openlabs/cr.openlabs.co.in,robfig/rietveld,ericmckean/rietveld,gco/rietveld,berkus/rietveld,fuzan/rietveld,robfig/rietveld,gavioto/rietveld,supriyantomaftuh/rietveld,gavioto/rietveld,rietveld-codereview/rietveld,v3ss0n/rietveld,google-code-export/rietveld,xtypebee/rietveld,supriyantomaftuh/rietveld,openlabs/cr.openlabs.co.in,Koulio/rietveld,google-code-export/rietveld,rietveld-codereview/rietveld,aungzanbaw/rietveld,supriyantomaftuh/rietveld,ericmckean/rietveld,andyzsf/rietveld