Sensibly format rows with table name on the right.

Sensibly format rows with table name on the right.

Rows were already too long to fit on a standard-width terminal, yet we were truncating names to fit in an arbitrary width.  Instead put the table name on the right and let it fill all available space.
Call ClearLine() after displaying each row so that displaying a shorter row when the display updates will not pollute the side of the screen.
Make sure we don't try to draw lines too low down on the screen.