home-cursor, xresources: use `profileExtra` instead of `initExtra`

[wrvsrx]

Description

xsession.initExtra is executed after systemd graphical-session.target, which means graphical applications started by graphical-session.target can get these x settings.

Checklist

• [x] Change is backwards compatible.

• [x] Code formatted with ./format.

• [ ] Code tested through nix-shell --pure tests -A run.all or nix develop --ignore-environment .#all using Flakes.

• [ ] Test cases updated/added. See example.

• [x] Commit messages are formatted like

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  See CONTRIBUTING for more information and recent commit messages for examples.

• If this PR adds a new module

  • [ ] Added myself as module maintainer. See example.

Maintainer CC

@rycee @polykernel @league