Add developer lua script that sets property visibility to "Developer" if an environment variable called "OPENSPACE_DEVELOPER" is set

Co-authored-by: Alexander Bock <mail@alexanderbock.eu>

Co-authored-by: Ylva Selling <ys5140@nyu.edu>

 - Turn the planet lighting actions from mixed case to lower case
 - Fix the openspace.rebindKey Lua function which did not work before
 - Fix the openspace.downloadFile function which would fail when not waiting for the the result
 - Rename openspace.walkDirectoryFolder to openspace.walkDirectoryFolders for consistency
 - Remove the openspace.saveLastChangeToProfile function

* Removed Orion nebula from base and added to default_full profile
* Updated paths for actions
* Added debug action for undoing event fading
Co-authored-by: Alexander Bock <mail@alexanderbock.eu>

* a new profile for the 2012 solar storm event, with looping hotkeys

* added interaction spheres, profile cleanup + better discription

* better actions and moved to assets instead of in profile

* Set unique names for the different fieldline data synchronizations

* single dataset in sequence now rendered before its associated timestamp

* fix read access violation + added redundancy

* load at start up instead of on runtime
Co-authored-by: Alexander Bock <mail@alexanderbock.eu>

Fixes position jumps in OSIRIS-REx mission

Feature/jwst spice update

It still happened every now and then that the rotation didn't quite finish at the end of the path

Reverts change that wrecked sky browser performance

Issue/2055

Make the connection a shared_ptr and let the LuaScriptTopic return lambda keep a copy of it (closes #1940)

* Prevent focus node from changing when recording finishes

* Updated color map for gala and apogee
* Adding apogee-galah values for when they are read properly

* Added all trail toggle
* Added actions for trails and planets/moons
* Added planet lighting assetd; updated action paths
* Add mars layers actions
* Added new layers from Carter
* Cleaned up trail action names, cleaned up some default keybindings
Co-authored-by: Alexander Bock <mail@alexanderbock.eu>

Feature/skybrowser

Fix bug when selecting a default profile when a user profile with the same name exists (closes #2074).  Make it possible to specifiy a full path to a profile in the openspace.cfg file

* updated generic spice kernel for more range; added barycenter trails

* updated meta asset description for barycenter trails

Please let this be the last copy-paste error from the Lua codegen update