don't hide links on notebook page
don't hide links on notebook page

also fix margin hack, preventing the nav collapse from behaving properly
franblas/beaker-sharing-server,franblas/beaker-sharing-server,iamjakob/nbviewer,bollwyvl/nbviewer,franblas/beaker-sharing-server,Sage-Bionetworks/nbviewer,twosigma/beaker-sharing-server,Jay-Oh-eN/nbviewer,bollwyvl/nbviewer,thomasyu888/nbviewer,roxyboy/nbviewer,twosigma/beaker-sharing-server,twosigma/beaker-sharing-server,iamjakob/nbviewer,Jay-Oh-eN/nbviewer,roxyboy/nbviewer,twosigma/beaker-sharing-server,christophelec/nbviewer,imsparsh/nbviewer,franblas/beaker-sharing-server,thomasyu888/nbviewer,imsparsh/nbviewer,Sage-Bionetworks/nbviewer,AlfiyaZi/nbviewer,AlfiyaZi/nbviewer,christophelec/nbviewer