J4statusColour: Fix hexadecimal colour text

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
J4statusSection: Avoid useless defaults

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
J4statusSection: Allow to override some section parts

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
i3bar/man: Document the Align setting

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
i3bar: Use J4statusColour

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>