Fix overwrite of manual changes in export_presets.cfg when export dialog is opened
Fix overwrite of manual changes in export_presets.cfg when export dialog is opened

Ensures that behavior when export_presets.cfg file is edited manually
while editor is running remains identical to before commit 44094b0.

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