Is your feature request related to a problem? Please describe.
When using the EuiComboBox in single-value mode, the selected value should be truncated with ...

Currently this input looks something like...

The styles on the euiComboBoxPill seem to attempt to truncate the text with text-overflow:ellipsis but is not working correctly.

Expected result would be...

See demo at https://codesandbox.io/s/clever-rubin-rzk7sd?file=/src/App.tsx

Desired timeline
None