Passphrase Credential Secret field: Auto-select on click
Summary:
When looking at the Credential Secret you often probably want to copy it.
Highlight the entire string in the text field when clicking into the text field.
Closes T16520
Test Plan:
1. Go to http://phorge.localhost/passphrase/edit/?type=token
2. Set a `Name`, set some `Token`, click "Save"
3. On resulting http://phorge.localhost/K1, click "Show Secret"
4. In the dialog, click "Show Secret"
5. Click into the "Plaintext" field
6. See that Credential Secret value gets selected
Reviewers: O1 Blessed Committers, mainframe98
Reviewed By: O1 Blessed Committers, mainframe98
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T16520
Differential Revision: https://we.phorge.it/D26791