Make imGUI listen to OpenSpaceEngine properties for visibility for properties and for scene graph nodes

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