Describe the bug
Switching to pod view in all namespaces reports pod metrics as n/a

To Reproduce
Steps to reproduce the behavior:

1. Launch k9s
2. :po all

Expected behavior
Metrics if available should display cpu/mem numbers

Versions (please complete the following information):

• OS: 10.15.1
• K9s 0.10.6
• K8s 1.13.11