spdlog bundles a version of fmt. However, we also depend on and use fmt
directly. If we don't tell spdlog not to use its bundled version, we end
up with two versions of fmt in our include path, since both libraries
are header-only, meaning any slight API mismatches will cause build
failures and undesired behavior.
We seem to have gotten lucky so far, but I ran into all sorts of issues
when I tried to update to a newer version of spdlog. This change
prevents them.
Currently, the bottom border on workspace buttons eats into the box size
and causes the text to sit higher than in other modules. This is ugly
when there are other modules (like the window title) right next to the
workspace module. To fix the issue, create the bottom border using an
inset box-shadow, which doesn't affect the box's content sizing.
Thomas Hebb