Show overflow indicator in results grid for multi line text

Describe the solution you'd like

If the text in a cell is longer than the column width, the text is truncated and a ... is displayed to indicate the horizontal overflow. If the overflow occurs vertically instead, due to a line break, the overflow is invisible.

Describe alternatives you've considered

Double-click the cell to open its contents in a popup. To do this, you first need to know that there is an overflow.

To further optimise the handling of long text, it would be great to have the ability to increase the height of the lines in the results grid, or a larger dockable panel (like the Scratch Pad) that stays visible next to the results grid and showing the contents of the currently selected cell!

Additional context

See example here:

Even psql -X will show an indicator (and the full contents) in this case:

This feature request was inspired by feedback from @sfkeller, who reported this as a problem when teaching SQL to his students.

The issue does not name files or tests. Reproduce the multiline-cell case in the results grid using the screenshots and compare it with psql -X; then locate the grid implementation and its existing truncation behavior. Done means vertically overflowing text has a visible indicator without changing the requested grid behavior beyond that indicator.