How to show missing buttons in UCI interface

Problem

In new interface of Dynamics CRM certain button on ribbon might not available. For example, Qualify button on Leads form or Add Existing button on subgrid ribbon. 

Solution

1. Add entity meta data to a solution, say, LeadsRibbon
2. Open solution in ribbon workbench
3. On form ribbon of Leads, right click on Qualify button and select Customize Command
4. Under Enable Rule section of the command remove below highlighted rule
5. Publish solution

Cheers!!!!