Editing field in record in large tables loses place in viewport

Using 1.15 dev with wxw 2.9.3:

When using large table (happens with 20K records), right click table in 
browser window, choose view all data. Table has PK. Select a record in 
the middle of the listing and click to edit contents of a column in 
viewport. Viewport immediately navigates away from the record to be 
edited, either up or down and by several hundred records. It is very 
difficult to readjust the viewport using sliders to find the editing 
box. Using keyboard (up down left right arrows) to try to relocate it 
does not work.

Solution is to subset the records to a much smaller number.
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Colin Beckingham
613-454-5369
http://www.it4gh.com