[Lens] "Show defaults of error" doesn't become "Hide details of error" once opened

[ghudgins]

Kibana version:
7.13-SNAPSHOT

Elasticsearch version:
7.13-SNAPSHOT

Original install method (e.g. download page, yum, from source, etc.):
Cloud deployment

Describe the bug:

In Lens, the text "Show details of error" functions properly but the string is inaccurate once the details are shown.

Steps to reproduce:

1. In Lens, create an invalid runtime field
2. Drag the field, producing Lens error state
3. Click "Show details of error

Result: the details show, but the button says "Show details of error"

Expected behavior:

the details show, but the button says "Hide details of error" indicating the details can be hidden

Screenshots (if relevant):

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)