Hides UI panels by default

[louislelay]

The UI no longer opens with the panels visible by default. They can be toggled back on using Tab or Shift+Tab.

[saikishor]

LGTM

@eholum-nasa should we update the README.md about the shortcuts to bring back the panels?, just for the beginners or is it not needed?

[sea-bass]

My vote would be to add these instructions to the README because there doesn't seem to be a menu that lets you do this without keyboard shortcuts.

[saikishor]

My vote would be to add these instructions to the README because there doesn't seem to be a menu that lets you do this without keyboard shortcuts.

Thanks

[saikishor]

@louislelay please update the readme with the proper description

[louislelay]

Done @saikishor and @sea-bass!

[ndunkelb-nasa]

Looks good! I think we could also probably link to something like this video in the documentation for general simulate tools.

I don't think it belongs here, but in general, I wonder if we could do something similar to rviz configs that get loaded in. For example, I decided that rangefinders shouldn't be on by default, so added this, but I imagine that it could be useful to load certain simulate window configs based on what is desired. Of course, it would be hard to integrate because we would have to parse yet another file and do more manual mappings of strings to simulate flags, but it would be doable.

[eholum-nasa]

Thanks, @louislelay! Some minor, minor nits on the README but this is a nice change :)

[eholum-nasa]

pre-commit fix suggestion

[louislelay]

Nice! Thank you everyone for taking a look :)