browser: if stateParams.page is already a number, do not fail
browser: if stateParams.page is already a number, do not fail

If stateParams.page is already a number in explore state, do not attempt
to trim it and parse it. Fixes paging.

supriyantomaftuh/marklogic-samplestack,dmcassel/marklogic-samplestack,dmcassel/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,omkarudipi/marklogic-samplestack,omkarudipi/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,omkarudipi/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,omkarudipi/marklogic-samplestack,marklogic/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,dmcassel/marklogic-samplestack,laurelnaiad/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,marklogic/marklogic-samplestack,dmcassel/marklogic-samplestack,laurelnaiad/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,laurelnaiad/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack