dashboard: fix pagination on perf page Currently the 'latest' button on perf page leads to build page.
dashboard: fix pagination on perf page
Currently the 'latest' button on perf page leads to build page.

LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/159990044

golang/build,proppy/build,proppy/build,proppy/build,evandbrown/build,golang/build,evandbrown/build,evandbrown/build,proppy/build,golang/build,golang/build