core/packs/pack-mode-line: Do not auto-enable the mode-line stuff

Do not automatically enable neither mode-line-in-header, nor
hidden-mode-line-mode.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
users/algernon/hosts/hadhodrond.el: Settings refactored

Load molokai theme on emacs-snapshot, solarized-dark on emacs24. On
emacs-snapshot, also enable mode-line-in-header.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>