Indicate Sequence "Range" info, or sequence under mouse info, in information bar when selecting ranges.

When selecting a range of sequences using mouse-drag across a number of sequence IDs, info about the first sequence is shown in the information bar, but information about the sequence the mouse is currently over would be useful (e.g. when trying to select 17 sequences, showing the sequence number).
Perhaps, show a "sequence range" information (from first and last sequence in current selection) whilst still in the mouse-drag.