Enhancement: allow user-specified sort order of grid rows and columns

[klauer]

Issue

Currently, the rows and columns in the device overview grid are sorted alphabetically.

In order to rearrange the order, the user has to take care to change the functional/location group in the happi database just to change the home display. This can include making arbitrary values for these fields just to make them in alphabetical order.

Configuration settings as in master

Right now, we have configuration settings:

• Passed as command-line parameters
  • Toolbar location
  • Row group key
  • Column group key
  • Log level
  • Dark colorscheme
• Toolbar
  • Stored in a separate file, pointed to by command-line parameter
  • These toolbar configurations are fortunately named a very specific {hutch}_toolbar.yml

Simplest proposal

An easier solution with less refactoring could include just:

• Two new command-line parameters that set the sort order of rows/columns

If we're to take it on, I think it's worth looking at a different option (next section).

Ideal proposal

I think that the separation of command-line parameter vs configuration-file specified parameters is a bit haphazard.
I would suggest:

• Add a top-level configuration file to LUCID that contains all command-line parameter settings
• The toolbar settings could be wrapped into the overall settings or remain separate
• Add a grid configuration setting
  • Row group key
  • Column group key
  • Row group order
  • Column group order

Rows/columns not in the list would be added in alphabetical order at the end of the grid.