Taxonomy: picker dialog too small

In 14.4.0, as part of adding a search box to the TaxonomyPickerDialog, see CMS-13060, the dialog has become much smaller.

Code change:

    /// was: setSize(DialogConstants.LARGE_AUTO);
    setSize(DialogConstants.SMALL_RELATIVE); 

 
Not sure if that was intended but this is not working out for users with not such a big screen, say a laptop with lower resolution than expected.