* Add `TextFormat::extra_letter_spacing`
* Add control of line height
* Add to text layout demo
* Move the text layout demo to its own window in the demo app
* Fix doclink
* Better document points vs pixels
* Better documentation and code cleanup
* Add option to clip text to wrap width
* Spelling
* Better naming, and report back wether the text was elided
* Improve docstrings
* Simplify
* Fix max_rows with multiple paragraphs
* Add note
* Typos
* fix doclink
* Add `Label::elide`
* Label: show full non-elided text on hover
* Add demo of `Label::elide`
* Call it `Label::truncate`
* Clarify limitations of `break_anywhere`
* Better docstrings
* use font metrics in layout
* properly center scaled fonts
* adjust docs
* fix raised text
* fix easymark viewer small text alignment
caused by variable row heights
Closes https://github.com/emilk/egui/issues/2068
Before this PR, the default font, Ubuntu-Light, was ~11% smaller
than it should have been, and the default monospace font, Hack,
was ~14% smaller. This means that setting the font size `12` in egui
would yield smaller text than using that font size in any other app.
Ooops!
The change is that this PR now takes into account the ttf properties
`units_per_em` and `height_unscaled`.
If your egui application has specified you own font sizes or text styles
you will see the text in your application grow
larger, unless you go in and compensate by dividing all font sizes by
~1.21 for Ubuntu-Light/Proportional and ~1.16 for Hack/Monospace,
and with something else if you are using a custom font!
This effects any use of `FontId`, `RichText::size`, etc.
This PR changes the default `Style::text_styles` to compensate,
so the default egui style should look the same before and after this PR.
