Some mobile browsers (e.g. chrome) uses collapsing url bars (the
bar collapses when you scroll). In such cases, `100vh` typically
refers to the full height of the viewport when the url bar is
collapsed (see also `svh`, `lvh` and `dvh`, e.g. at
<https://ishadeed.com/article/new-viewport-units/#the-small-large-and-dynamic-viewport-units>
). This meant that on my tablet, the editor would extend below the
visible page until I scrolled it into view.
This commit re-uses a fix from some of my other projects
(specifically
<5c7e788d40/src/styles/globals.css (L14-L28)>
) where the root element is set to fill 100% height. This avoids
dealing with viewport units altogether. On my tablet, this means
that the url bar is visible and that the editor does not extend
below the visible page.
