Documentation: Fix REST API example box width
Documentation: Fix REST API example box width

In 3eb809dd034cc93685f36a175f52ff7e49e03f23 the max width of the page
was set to 900px, but the REST API example boxes were still set with
a fixed width of 100em which caused them to extend out to the right
of the page.

Remove the fixed width of the box, and set "overflow: auto".  This
makes the boxes fit within the page width, with a horizontal scroll
bar on the ones that have wider content.

Change-Id: I6f64c314e4eb484d9c5120fd0fd5589fcaa8b77e

MerritCR/merrit,hdost/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,pkdevbox/gerrit,Seinlin/gerrit,thesamet/gerrit,hdost/gerrit,thesamet/gerrit,GerritCodeReview/gerrit,anminhsu/gerrit,quyixia/gerrit,Distrotech/gerrit,pkdevbox/gerrit,qtproject/qtqa-gerrit,pkdevbox/gerrit,Team-OctOS/host_gerrit,Overruler/gerrit,dwhipstock/gerrit,quyixia/gerrit,dwhipstock/gerrit,MerritCR/merrit,Team-OctOS/host_gerrit,WANdisco/gerrit,hdost/gerrit,TonyChai24/test,Team-OctOS/host_gerrit,Seinlin/gerrit,jackminicloud/test,TonyChai24/test,TonyChai24/test,supriyantomaftuh/gerrit,netroby/gerrit,Saulis/gerrit,renchaorevee/gerrit,dwhipstock/gerrit,Distrotech/gerrit,TonyChai24/test,Distrotech/gerrit,Overruler/gerrit,Overruler/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,Team-OctOS/host_gerrit,Team-OctOS/host_gerrit,renchaorevee/gerrit,gerrit-review/gerrit,thinkernel/gerrit,gcoders/gerrit,hdost/gerrit,supriyantomaftuh/gerrit,supriyantomaftuh/gerrit,joshuawilson/merrit,pkdevbox/gerrit,pkdevbox/gerrit,thesamet/gerrit,MerritCR/merrit,thesamet/gerrit,anminhsu/gerrit,midnightradio/gerrit,Overruler/gerrit,Overruler/gerrit,midnightradio/gerrit,MerritCR/merrit,thinkernel/gerrit,netroby/gerrit,MerritCR/merrit,Seinlin/gerrit,WANdisco/gerrit,Seinlin/gerrit,Overruler/gerrit,qtproject/qtqa-gerrit,MerritCR/merrit,GerritCodeReview/gerrit,Saulis/gerrit,pkdevbox/gerrit,gerrit-review/gerrit,MerritCR/merrit,supriyantomaftuh/gerrit,hdost/gerrit,joshuawilson/merrit,joshuawilson/merrit,netroby/gerrit,Saulis/gerrit,supriyantomaftuh/gerrit,WANdisco/gerrit,Distrotech/gerrit,dwhipstock/gerrit,quyixia/gerrit,Saulis/gerrit,jackminicloud/test,quyixia/gerrit,gcoders/gerrit,anminhsu/gerrit,anminhsu/gerrit,Seinlin/gerrit,thesamet/gerrit,jackminicloud/test,quyixia/gerrit,joshuawilson/merrit,Team-OctOS/host_gerrit,supriyantomaftuh/gerrit,qtproject/qtqa-gerrit,jackminicloud/test,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,gcoders/gerrit,netroby/gerrit,netroby/gerrit,supriyantomaftuh/gerrit,thesamet/gerrit,WANdisco/gerrit,WANdisco/gerrit,thinkernel/gerrit,quyixia/gerrit,WANdisco/gerrit,Saulis/gerrit,TonyChai24/test,qtproject/qtqa-gerrit,dwhipstock/gerrit,renchaorevee/gerrit,GerritCodeReview/gerrit,anminhsu/gerrit,gcoders/gerrit,netroby/gerrit,dwhipstock/gerrit,Distrotech/gerrit,qtproject/qtqa-gerrit,jackminicloud/test,dwhipstock/gerrit,joshuawilson/merrit,thesamet/gerrit,netroby/gerrit,TonyChai24/test,joshuawilson/merrit,Distrotech/gerrit,gerrit-review/gerrit,renchaorevee/gerrit,quyixia/gerrit,thinkernel/gerrit,midnightradio/gerrit,gerrit-review/gerrit,gcoders/gerrit,joshuawilson/merrit,anminhsu/gerrit,jackminicloud/test,Team-OctOS/host_gerrit,thinkernel/gerrit,anminhsu/gerrit,hdost/gerrit,gerrit-review/gerrit,midnightradio/gerrit,renchaorevee/gerrit,GerritCodeReview/gerrit,TonyChai24/test,renchaorevee/gerrit,gerrit-review/gerrit,WANdisco/gerrit,MerritCR/merrit,gcoders/gerrit,gcoders/gerrit,pkdevbox/gerrit,hdost/gerrit,thinkernel/gerrit,renchaorevee/gerrit,jackminicloud/test,joshuawilson/merrit,gerrit-review/gerrit,Seinlin/gerrit,thinkernel/gerrit,midnightradio/gerrit,Saulis/gerrit,Seinlin/gerrit,Distrotech/gerrit,midnightradio/gerrit