This is probably a very simple thing.

In most applications, you can click on a field or tab to that field and
focus remains on that field despite mouse location.

However, with MOSAIC, not only must you click on the field, but the
mouse must remain on that field, otherwise any characters you type go to
the big bit bucket behind the root window :-)

Is there a simple resource I can set so that MOSAIC will behave as all
other applications with a "sticky" focus that remains on a field even if
the mouse has driften out of that field ?