Improve content & size of confirmation message on clicking an edit content button when another document is opened in the sidepanel and has unsaved changes

The message text says:

<Document name>' has unsaved changes. Do you want to save or discard these changes before opening a new document?

use 'another' instead of 'new' (because it is not a new document...)

The dialog is very wide. Could its width be reduced (to about 1/2  or 2/3)?