Previously, the only way to select all the module labels was with the
following kind of selector:
```css
.modules-left > widget > label,
.modules-center > widget > label,
.modules-right > widget > label {
/* ... */
}
```
(and a matching block for the `box` containers).
Now, this can be expressed as
```css
label.module, box.module {
/* ... */
}
```
There were two main issues with fmtlib and C++20 mode:
- `fmt::format` defaults to compile-time argument checking and requires
using `fmt::runtime(format_string)` to bypass that.
- `std::format` implementation introduces conflicting declarations and
we have to specify the namespace for all `format`/`format_to` calls.
adds the set-tags and toggle-tags setting so it's possible to have
different tags set vs toggled. This enables the use of e.g. sticky tags
Also clean-up the code a bit.
Aleksei Bavshin
Matias-Hall
Alex
Alexander Courtis
shironeko
tiosgz
trevnels
John Fredriksson
Isaac Freund
sjtio