Updated cursor positioning description for File open()
Updated cursor positioning description for File open()

Added more details about the cursor offsets for the different ModeFlags
in the `File` class.

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