fix: "Toggle Decode" only implemented for Describe

[nagytiboradam]

Secret decode toggling is only implemented for describe action, for yaml action it's not, so this change would limit it to the former.
Would it make sense to implement decode toggling for yaml too?

[placintaalexandru]

Hello @nagytiboradam

I wrote that IsDecodable part. It was meant to allow the user to view, if possible, everything that could be base64 decoded.

To answer your questions:

1. I do not see any purpose with && v.title == describeAction. In the future we may have other base64 encoded resources that users may want to see the values for and the command may not be describe, but something else.
2. I do not think it makes sense to implement decode toggling for yaml (and here I'll be very specific with my use case): I want to see the yaml to copy it to a file and apply it in another namespace, so for secrets I want to see the yaml with base64 values