-The goal is to make painting with drawing disable fast enough that it
-can be used after every metrics computation. Then we can separate real
-drawing from metrics.
-
-** DONE RowPainter
-
-Inset position is set in paintInset, paintOnlyInsets, and paintText.
-This should be done only once in paintInset
-
-** DONE TextMetrics::drawParagraph
-
-We can really simplify the code when drawing is disabled only
-paintInset needs to be called.
- + do right at the start when drawing is already disabled
- + do it in the loop for rows that are not visible on screen.
-
-The only thing we want to do here is to set inset positions (for
-text). The other insets still use the painter with drawing disabled.
-
-** Painter::text