`org-roam-db-location` is redefined in the :preface section, so we need
to rely on a different symbol to determine whether `org-roam` is loading
or not.
`org-roam-mode` based buffers use `magit-section` to render sections.
The problem is that `magit-section` will layer keymaps for each section
under a text property. In Emacs, text property based keymaps have a
higher precedence for a lookup[0] than `emulation-mode-map-alists`, in
which Evil and leader keymaps are stored in.
[0]: https://www.gnu.org/software/emacs/manual/html_node/elisp/Searching-Keymaps.html
v2 reverted to using `emacsql-sqlite` instead of `emacsql-sqlite3`. It
will now try to build the needed `sqlite3` executable by itself, using a
C compiler that it can find, which is normally gcc or clang.
Previously in v1 it would only check for `sqlite3` executable (using
`executable-find`) and wouldn't do anything else.
