Fix 3D scene preview generation.
Fix 3D scene preview generation.

File system dock previews will now be generated for 3D scenes when no
editor feature profile is set.

vnen/godot,godotengine/godot,vnen/godot,firefly2442/godot,sanikoyes/godot,Zylann/godot,BastiaanOlij/godot,josempans/godot,honix/godot,Zylann/godot,akien-mga/godot,vkbsb/godot,BastiaanOlij/godot,akien-mga/godot,BastiaanOlij/godot,Shockblast/godot,josempans/godot,pkowal1982/godot,josempans/godot,firefly2442/godot,Shockblast/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,Zylann/godot,godotengine/godot,firefly2442/godot,Shockblast/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,vkbsb/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,honix/godot,akien-mga/godot,godotengine/godot,DmitriySalnikov/godot,vkbsb/godot,Shockblast/godot,Faless/godot,sanikoyes/godot,godotengine/godot,DmitriySalnikov/godot,Valentactive/godot,Zylann/godot,vkbsb/godot,DmitriySalnikov/godot,honix/godot,vkbsb/godot,sanikoyes/godot,josempans/godot,pkowal1982/godot,josempans/godot,Valentactive/godot,Faless/godot,Shockblast/godot,Shockblast/godot,guilhermefelipecgs/godot,akien-mga/godot,ZuBsPaCe/godot,josempans/godot,Shockblast/godot,Faless/godot,godotengine/godot,akien-mga/godot,sanikoyes/godot,Faless/godot,vnen/godot,Valentactive/godot,pkowal1982/godot,vnen/godot,akien-mga/godot,vkbsb/godot,Faless/godot,sanikoyes/godot,vkbsb/godot,honix/godot,Zylann/godot,josempans/godot,ZuBsPaCe/godot,Zylann/godot,honix/godot,godotengine/godot,firefly2442/godot,pkowal1982/godot,godotengine/godot,vnen/godot,DmitriySalnikov/godot,guilhermefelipecgs/godot,pkowal1982/godot,pkowal1982/godot,Faless/godot,firefly2442/godot,Valentactive/godot,firefly2442/godot,BastiaanOlij/godot,Faless/godot,Shockblast/godot,Faless/godot,firefly2442/godot,pkowal1982/godot,sanikoyes/godot,Zylann/godot,ZuBsPaCe/godot,BastiaanOlij/godot,Zylann/godot,guilhermefelipecgs/godot,ZuBsPaCe/godot,BastiaanOlij/godot,firefly2442/godot,godotengine/godot,sanikoyes/godot,pkowal1982/godot,Valentactive/godot,BastiaanOlij/godot,Valentactive/godot,vnen/godot,ZuBsPaCe/godot,akien-mga/godot,DmitriySalnikov/godot,Valentactive/godot,akien-mga/godot,sanikoyes/godot,guilhermefelipecgs/godot,josempans/godot,honix/godot,DmitriySalnikov/godot,vnen/godot,vkbsb/godot,ZuBsPaCe/godot,vnen/godot,Valentactive/godot,guilhermefelipecgs/godot,BastiaanOlij/godot