Add data-index attribute to newly created page parts.
Add data-index attribute to newly created page parts.

It is needed because page part ordering sets page part position using
data-index value.

Retimont/refinerycms,Retimont/refinerycms,simi/refinerycms,Eric-Guo/refinerycms,chrise86/refinerycms,gwagener/refinerycms,johanb/refinerycms,bricesanchez/refinerycms,bryanmtl/g-refinerycms,anitagraham/refinerycms,mabras/refinerycms,mlinfoot/refinerycms,simi/refinerycms,sideci-sample/sideci-sample-refinerycms,chrise86/refinerycms,LytayTOUCH/refinerycms,simi/refinerycms,hoopla-software/refinerycms,mkaplan9/refinerycms,refinery/refinerycms,trevornez/refinerycms,aguzubiaga/refinerycms,sideci-sample/sideci-sample-refinerycms,mobilityhouse/refinerycms,Retimont/refinerycms,stefanspicer/refinerycms,mobilityhouse/refinerycms,mlinfoot/refinerycms,louim/refinerycms,stefanspicer/refinerycms,stefanspicer/refinerycms,gwagener/refinerycms,simi/refinerycms,hoopla-software/refinerycms,mlinfoot/refinerycms,KingLemuel/refinerycms,LytayTOUCH/refinerycms,mkaplan9/refinerycms,kelkoo-services/refinerycms,KingLemuel/refinerycms,trevornez/refinerycms,bryanmtl/g-refinerycms,hoopla-software/refinerycms,kappiah/refinerycms,refinery/refinerycms,louim/refinerycms,johanb/refinerycms,kelkoo-services/refinerycms,anitagraham/refinerycms,LytayTOUCH/refinerycms,trevornez/refinerycms,kappiah/refinerycms,johanb/refinerycms,aguzubiaga/refinerycms,mkaplan9/refinerycms,KingLemuel/refinerycms,gwagener/refinerycms,aguzubiaga/refinerycms,kappiah/refinerycms,Eric-Guo/refinerycms,Eric-Guo/refinerycms,anitagraham/refinerycms,refinery/refinerycms,mabras/refinerycms,mabras/refinerycms,bricesanchez/refinerycms,chrise86/refinerycms