Revert "Handle CancellationError at CM_View_Abstract.ajax."
Revert "Handle CancellationError at CM_View_Abstract.ajax."

This reverts commit e3b2b6cbb692e12034ce8d3b83dd3dd115edf15a.

njam/CM,vogdb/cm,vogdb/cm,vogdb/cm,fauvel/CM,zazabe/cm,alexispeter/CM,njam/CM,cargomedia/CM,cargomedia/CM,fauvel/CM,fauvel/CM,zazabe/cm,njam/CM,njam/CM,cargomedia/CM,vogdb/cm,fauvel/CM,zazabe/cm,zazabe/cm,vogdb/cm,tomaszdurka/CM,fauvel/CM,alexispeter/CM,alexispeter/CM,alexispeter/CM,njam/CM,tomaszdurka/CM,tomaszdurka/CM,tomaszdurka/CM,tomaszdurka/CM,cargomedia/CM