Fix preview of image on insert
Fix preview of image on insert

Problem: when inserting an image with the image picker in an image field, the preview is broken (broken image tag). (otherwise the preview works)

Solution: the image path is: `<path>?sha=some_sha?23432`, notice the random integer at the end, which isn't needed anymore (I assume). So I just deleted that part in the js file.

Background:
* the problem was mentioned by @eshaiju in https://github.com/refinery/refinerycms/issues/2681#issuecomment-56522971
* the random int was added here: https://github.com/refinery/refinerycms/commit/ec3f2a907116a8c1c9afc59bb082cdb8c3b9c2b5
sideci-sample/sideci-sample-refinerycms,Eric-Guo/refinerycms,simi/refinerycms,simi/refinerycms,chrise86/refinerycms,chrise86/refinerycms,kappiah/refinerycms,Retimont/refinerycms,anitagraham/refinerycms,chrise86/refinerycms,bricesanchez/refinerycms,kappiah/refinerycms,sideci-sample/sideci-sample-refinerycms,johanb/refinerycms,stefanspicer/refinerycms,mlinfoot/refinerycms,simi/refinerycms,stefanspicer/refinerycms,kappiah/refinerycms,bricesanchez/refinerycms,anitagraham/refinerycms,mabras/refinerycms,stefanspicer/refinerycms,mabras/refinerycms,hoopla-software/refinerycms,mkaplan9/refinerycms,KingLemuel/refinerycms,aguzubiaga/refinerycms,aguzubiaga/refinerycms,johanb/refinerycms,simi/refinerycms,Retimont/refinerycms,KingLemuel/refinerycms,Eric-Guo/refinerycms,LytayTOUCH/refinerycms,anitagraham/refinerycms,gwagener/refinerycms,Retimont/refinerycms,mabras/refinerycms,mkaplan9/refinerycms,hoopla-software/refinerycms,mkaplan9/refinerycms,LytayTOUCH/refinerycms,johanb/refinerycms,mlinfoot/refinerycms,refinery/refinerycms,mlinfoot/refinerycms,gwagener/refinerycms,Eric-Guo/refinerycms,trevornez/refinerycms,refinery/refinerycms,refinery/refinerycms,aguzubiaga/refinerycms,trevornez/refinerycms,trevornez/refinerycms,LytayTOUCH/refinerycms,hoopla-software/refinerycms,gwagener/refinerycms,KingLemuel/refinerycms