Modify the subpx util to wrap around text layer instead of inside
Modify the subpx util to wrap around text layer instead of inside

This is a bug fix for annotations, because text selection serializes
differently with/out the subpx layer when using .crocodoc-page-text as
the reference element.

denodster/viewer.js,box/viewer.js,vdclouis/viewer.js,vdclouis/viewer.js,lakenen/viewer.js,lakenen/viewer.js,denodster/viewer.js,vdclouis/viewer.js,lakenen/viewer.js,box/viewer.js,box/viewer.js,denodster/viewer.js