selection_manager.coffee: use .set instead of .save
selection_manager.coffee: use .set instead of .save

.save doesn't work anymore; I'm not sure why it was using that instead
of set, and I'm worried this breaks something as a result, but save()
definitely doesn't work anymore.

maxalbert/bokeh,mindriot101/bokeh,justacec/bokeh,phobson/bokeh,KasperPRasmussen/bokeh,draperjames/bokeh,DuCorey/bokeh,htygithub/bokeh,percyfal/bokeh,ptitjano/bokeh,percyfal/bokeh,aiguofer/bokeh,Karel-van-de-Plassche/bokeh,percyfal/bokeh,quasiben/bokeh,aavanian/bokeh,draperjames/bokeh,msarahan/bokeh,draperjames/bokeh,ericmjl/bokeh,dennisobrien/bokeh,KasperPRasmussen/bokeh,aiguofer/bokeh,aavanian/bokeh,msarahan/bokeh,maxalbert/bokeh,rs2/bokeh,stonebig/bokeh,stonebig/bokeh,stonebig/bokeh,Karel-van-de-Plassche/bokeh,msarahan/bokeh,gpfreitas/bokeh,phobson/bokeh,ptitjano/bokeh,phobson/bokeh,quasiben/bokeh,jakirkham/bokeh,philippjfr/bokeh,aavanian/bokeh,KasperPRasmussen/bokeh,DuCorey/bokeh,ptitjano/bokeh,htygithub/bokeh,maxalbert/bokeh,htygithub/bokeh,bokeh/bokeh,schoolie/bokeh,jakirkham/bokeh,rs2/bokeh,DuCorey/bokeh,azjps/bokeh,ptitjano/bokeh,percyfal/bokeh,DuCorey/bokeh,DuCorey/bokeh,quasiben/bokeh,htygithub/bokeh,draperjames/bokeh,azjps/bokeh,jakirkham/bokeh,timsnyder/bokeh,draperjames/bokeh,timsnyder/bokeh,philippjfr/bokeh,bokeh/bokeh,mindriot101/bokeh,dennisobrien/bokeh,Karel-van-de-Plassche/bokeh,mindriot101/bokeh,azjps/bokeh,timsnyder/bokeh,KasperPRasmussen/bokeh,dennisobrien/bokeh,philippjfr/bokeh,bokeh/bokeh,aavanian/bokeh,aiguofer/bokeh,clairetang6/bokeh,mindriot101/bokeh,schoolie/bokeh,timsnyder/bokeh,bokeh/bokeh,ericmjl/bokeh,maxalbert/bokeh,Karel-van-de-Plassche/bokeh,justacec/bokeh,phobson/bokeh,philippjfr/bokeh,bokeh/bokeh,gpfreitas/bokeh,stonebig/bokeh,schoolie/bokeh,justacec/bokeh,clairetang6/bokeh,Karel-van-de-Plassche/bokeh,azjps/bokeh,gpfreitas/bokeh,rs2/bokeh,clairetang6/bokeh,jakirkham/bokeh,aiguofer/bokeh,ericmjl/bokeh,aavanian/bokeh,ericmjl/bokeh,jakirkham/bokeh,schoolie/bokeh,philippjfr/bokeh,justacec/bokeh,percyfal/bokeh,schoolie/bokeh,rs2/bokeh,KasperPRasmussen/bokeh,ericmjl/bokeh,dennisobrien/bokeh,phobson/bokeh,dennisobrien/bokeh,gpfreitas/bokeh,aiguofer/bokeh,azjps/bokeh,clairetang6/bokeh,rs2/bokeh,ptitjano/bokeh,timsnyder/bokeh,msarahan/bokeh