Scrolling to a particular line in a TextEdit is very awkward

[JohnEmhoff]

Is your feature request related to a problem? Please describe.
It is somewhat awkward to programmatically scroll a large multiline TextEdit to a specific line. After some head scratching and looking through the text layout code, I came up with this:

let line_height = egui::Context::fonts(ui.ctx(), |f| {
    f.row_height(&egui::TextStyle::Monospace.resolve(ui.style()))
});
let pixels_per_point = ui.ctx().pixels_per_point();
let rounded_line_height = (line_height * pixels_per_point).round() / pixels_per_point;
let offset = rounded_line_height * scroll_to_line_number;

The issue is that the developer needs to exactly, precisely reproduce how the layout code works -- tiny errors become big errors when scrolling to a large enough offset.

Describe the solution you'd like
It would be nice if a TextEdit had a scroll_to_line() method or something similar.

Describe alternatives you've considered
Is there currently a simpler way to accomplish what I wrote above? I certainly might have missed a method that would give me the pixel-perfect line height for a font, for example.

Additional context
<3