Remove FileSystem dock errors on unimported files
Remove FileSystem dock errors on unimported files

* Removes error shown when file is in 'keep' mode
* Display a warning when attempting to open the file
* Closes #47296

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