Deleting row settled by hSet

[anton-reviakin]

RDM Version: 0.9.1.771
Environment (OS name and version): Windows 10
Redis Server Version: Redis server v=3.0.6 sha=00000000:0 malloc=jemalloc-3.6.0 bits=64 build=687a2a319020fa42 (on Ubuntu 16.04)

Steps to reproduce:

1. Element by hSet. Click button "Delete row"
   

Actual Result: Crash