Fix the 3D grid color setting hints
Fix the 3D grid color setting hints

It was mistakenly changed to RGBA in #18525 when it should have
stayed RGB (the 3D grid does not currently support transparency).

godotengine/godot,akien-mga/godot,Valentactive/godot,NateWardawg/godot,Shockblast/godot,Shockblast/godot,okamstudio/godot,mcanders/godot,RandomShaper/godot,godotengine/godot,NateWardawg/godot,mcanders/godot,vnen/godot,vnen/godot,sanikoyes/godot,Valentactive/godot,pkowal1982/godot,akien-mga/godot,ZuBsPaCe/godot,pkowal1982/godot,vkbsb/godot,ex/godot,josempans/godot,Shockblast/godot,Shockblast/godot,ZuBsPaCe/godot,okamstudio/godot,Faless/godot,DmitriySalnikov/godot,josempans/godot,Paulloz/godot,josempans/godot,guilhermefelipecgs/godot,ex/godot,RandomShaper/godot,ex/godot,Paulloz/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,honix/godot,akien-mga/godot,Shockblast/godot,sanikoyes/godot,groud/godot,vnen/godot,NateWardawg/godot,Valentactive/godot,ZuBsPaCe/godot,MarianoGnu/godot,Valentactive/godot,ex/godot,sanikoyes/godot,firefly2442/godot,Faless/godot,ZuBsPaCe/godot,firefly2442/godot,Faless/godot,BastiaanOlij/godot,okamstudio/godot,Zylann/godot,okamstudio/godot,Shockblast/godot,vnen/godot,Faless/godot,honix/godot,ex/godot,groud/godot,guilhermefelipecgs/godot,okamstudio/godot,MarianoGnu/godot,groud/godot,pkowal1982/godot,Zylann/godot,akien-mga/godot,RandomShaper/godot,BastiaanOlij/godot,mcanders/godot,MarianoGnu/godot,groud/godot,MarianoGnu/godot,firefly2442/godot,guilhermefelipecgs/godot,pkowal1982/godot,firefly2442/godot,RandomShaper/godot,okamstudio/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,firefly2442/godot,NateWardawg/godot,honix/godot,ZuBsPaCe/godot,BastiaanOlij/godot,ZuBsPaCe/godot,Shockblast/godot,vkbsb/godot,RandomShaper/godot,sanikoyes/godot,mcanders/godot,godotengine/godot,Zylann/godot,ex/godot,RandomShaper/godot,Valentactive/godot,BastiaanOlij/godot,sanikoyes/godot,Valentactive/godot,guilhermefelipecgs/godot,vnen/godot,josempans/godot,vkbsb/godot,vnen/godot,MarianoGnu/godot,vnen/godot,godotengine/godot,Zylann/godot,DmitriySalnikov/godot,NateWardawg/godot,honix/godot,NateWardawg/godot,Zylann/godot,akien-mga/godot,Zylann/godot,vnen/godot,josempans/godot,Valentactive/godot,Paulloz/godot,josempans/godot,ex/godot,Faless/godot,Paulloz/godot,godotengine/godot,BastiaanOlij/godot,okamstudio/godot,honix/godot,BastiaanOlij/godot,mcanders/godot,Zylann/godot,pkowal1982/godot,Faless/godot,akien-mga/godot,Paulloz/godot,groud/godot,BastiaanOlij/godot,NateWardawg/godot,godotengine/godot,josempans/godot,pkowal1982/godot,Shockblast/godot,vkbsb/godot,firefly2442/godot,guilhermefelipecgs/godot,josempans/godot,Paulloz/godot,vkbsb/godot,ex/godot,sanikoyes/godot,DmitriySalnikov/godot,vkbsb/godot,honix/godot,Faless/godot,MarianoGnu/godot,pkowal1982/godot,MarianoGnu/godot,akien-mga/godot,DmitriySalnikov/godot,godotengine/godot,okamstudio/godot,okamstudio/godot,guilhermefelipecgs/godot,groud/godot,godotengine/godot,akien-mga/godot,okamstudio/godot,NateWardawg/godot,sanikoyes/godot,Faless/godot,firefly2442/godot,pkowal1982/godot,DmitriySalnikov/godot,RandomShaper/godot,vkbsb/godot,sanikoyes/godot,Paulloz/godot,mcanders/godot,vkbsb/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,Valentactive/godot,ZuBsPaCe/godot,Zylann/godot,MarianoGnu/godot,firefly2442/godot,NateWardawg/godot