ProjectManager: prevent installing project template in non-empty dir
ProjectManager: prevent installing project template in non-empty dir

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