don't make duplicate slider/buttons on game_restart

[jack27121]

in my project, i often use a game restart for quick debugging, though that also duplicates everything i create with inspectron

my inspectron code at the end of my objects Create event

Inspectron()
	.Slider("roughness_strength",0,1)
	.Slider("normal_strength",0,1)
	.Slider("scale",0,4)
	.Slider("offset_scale",-1,1)
	.render()

code to restart when pressing R
game_restart();

[shdwcat]

Sorry I missed seeing this! When I get a chance I will see if I can fix this