Improve dimension panel copy text

[dej611]

Some copy enhancements to the current copy state of the Lens dimension panel:

1. Message in case of wrong field ( reference )

Use

This field does not work with the selected function

instead of

To use this function, select a different field

2. Panel configuration wording in title ( reference )

The suggestion is to remove the word configuration from the panel header title:

[elasticmachine]

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