fix spurious error messages during autocomplete and validate
fix spurious error messages during autocomplete and validate

_parse() caused resets on members like validating and
for_completion by calling clear().

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