Issue sorting columns using shift-alpha keys

[duttkin]

Describe the bug
Sorting (using shift-alpha keys) no longer works properly in version v0.25.16. I use the age sort (shift-A) heavily and using that key sequence no longer sorts the column by age. Most other sorts fail as well.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'pods'
2. Press shift-A
3. see that pods are not sorting and arrow is not displayed on Age column showing sort direction

Expected behavior
Expect the column to sort by age and an arrow to appear next to the Age column header showing the direction you are currently sorting

Versions (please complete the following information):

• OS: Linux-x86_64 (kernal 5.4.0-91-generic)
• K9s: v0.25.16
• Ubuntu: 20.04.03

[derailed]

dup #1402