Restore and improve some ParticlesMaterial docs
Restore and improve some ParticlesMaterial docs

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