dashboard color changes

dashboard color changes

- Changed css for dash_checked, dash_holds, dash_pickup and dash_fines
  to set the color to #424242 instead of the various random colors
  they were previously using.

Might want to revisit this at some point in the future to set up
conditionals to cause different colors to be used depending on state
(such as fines >$0).

Signed-off-by: William Rockwood <wrockwood@tadl.org>