improvement: remove indexes from db, store and cstorage
Revert "improvement: remove indexes from db, store and cstorage"

This reverts commit a2e5ea172976b9288b0cb01cce692b8802ca33fc.
Merge branch 'bugfixes'
improve mongo find requests in resolving sort, limit and offset by server processing instead of pymongo, and ensure there is no rest request in textcell in case of no selected metric.