Fix code completion drawing under other gui elements.
Fix code completion drawing under other gui elements.

Raises the z-index of the Script editor when the completion is shown.

fixes #1257
fixes #6690

okamstudio/godot,MarianoGnu/godot,josempans/godot,ZuBsPaCe/godot,honix/godot,Marqin/godot,godotengine/godot,firefly2442/godot,Faless/godot,pkowal1982/godot,groud/godot,NateWardawg/godot,guilhermefelipecgs/godot,MarianoGnu/godot,ex/godot,honix/godot,vkbsb/godot,FateAce/godot,vnen/godot,BastiaanOlij/godot,groud/godot,Shockblast/godot,guilhermefelipecgs/godot,sanikoyes/godot,firefly2442/godot,RebelliousX/Go_Dot,vkbsb/godot,Zylann/godot,MarianoGnu/godot,firefly2442/godot,ageazrael/godot,MarianoGnu/godot,guilhermefelipecgs/godot,vkbsb/godot,jejung/godot,Marqin/godot,RandomShaper/godot,guilhermefelipecgs/godot,RebelliousX/Go_Dot,vnen/godot,Shockblast/godot,DmitriySalnikov/godot,Faless/godot,josempans/godot,RebelliousX/Go_Dot,groud/godot,ZuBsPaCe/godot,okamstudio/godot,mcanders/godot,Valentactive/godot,pkowal1982/godot,okamstudio/godot,sanikoyes/godot,RandomShaper/godot,tomreyn/godot,akien-mga/godot,ageazrael/godot,FateAce/godot,DmitriySalnikov/godot,firefly2442/godot,vnen/godot,mcanders/godot,ficoos/godot,Faless/godot,okamstudio/godot,morrow1nd/godot,guilhermefelipecgs/godot,sanikoyes/godot,morrow1nd/godot,morrow1nd/godot,n-pigeon/godot,n-pigeon/godot,groud/godot,josempans/godot,DmitriySalnikov/godot,NateWardawg/godot,Zylann/godot,jejung/godot,jejung/godot,okamstudio/godot,FateAce/godot,MarianoGnu/godot,vnen/godot,vkbsb/godot,BastiaanOlij/godot,Shockblast/godot,ex/godot,morrow1nd/godot,zicklag/godot,exabon/godot,vnen/godot,ZuBsPaCe/godot,MrMaidx/godot,jejung/godot,NateWardawg/godot,Max-Might/godot,guilhermefelipecgs/godot,sanikoyes/godot,Paulloz/godot,ZuBsPaCe/godot,pkowal1982/godot,mcanders/godot,RandomShaper/godot,ex/godot,exabon/godot,jejung/godot,Brickcaster/godot,NateWardawg/godot,Faless/godot,zicklag/godot,Zylann/godot,mcanders/godot,godotengine/godot,akien-mga/godot,ex/godot,FateAce/godot,BastiaanOlij/godot,zicklag/godot,ZuBsPaCe/godot,ficoos/godot,MrMaidx/godot,Brickcaster/godot,okamstudio/godot,Zylann/godot,josempans/godot,zicklag/godot,Paulloz/godot,Faless/godot,n-pigeon/godot,ex/godot,pkowal1982/godot,tomreyn/godot,godotengine/godot,Brickcaster/godot,vnen/godot,ex/godot,Max-Might/godot,akien-mga/godot,okamstudio/godot,groud/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,vkbsb/godot,Zylann/godot,ageazrael/godot,Paulloz/godot,n-pigeon/godot,Valentactive/godot,NateWardawg/godot,Max-Might/godot,BastiaanOlij/godot,jejung/godot,godotengine/godot,honix/godot,MrMaidx/godot,josempans/godot,godotengine/godot,honix/godot,RebelliousX/Go_Dot,MarianoGnu/godot,ageazrael/godot,sanikoyes/godot,Valentactive/godot,n-pigeon/godot,Marqin/godot,pkowal1982/godot,vkbsb/godot,ficoos/godot,Max-Might/godot,DmitriySalnikov/godot,Faless/godot,honix/godot,exabon/godot,Valentactive/godot,ficoos/godot,NateWardawg/godot,Shockblast/godot,mcanders/godot,pkowal1982/godot,exabon/godot,Max-Might/godot,MarianoGnu/godot,akien-mga/godot,sanikoyes/godot,mcanders/godot,vkbsb/godot,Faless/godot,godotengine/godot,RandomShaper/godot,Zylann/godot,RebelliousX/Go_Dot,firefly2442/godot,tomreyn/godot,Valentactive/godot,okamstudio/godot,honix/godot,tomreyn/godot,firefly2442/godot,morrow1nd/godot,ageazrael/godot,pkowal1982/godot,firefly2442/godot,Paulloz/godot,NateWardawg/godot,n-pigeon/godot,firefly2442/godot,Zylann/godot,morrow1nd/godot,ZuBsPaCe/godot,vkbsb/godot,godotengine/godot,RandomShaper/godot,exabon/godot,BastiaanOlij/godot,Marqin/godot,Marqin/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,josempans/godot,RebelliousX/Go_Dot,akien-mga/godot,ageazrael/godot,Brickcaster/godot,MrMaidx/godot,Brickcaster/godot,MarianoGnu/godot,Faless/godot,Paulloz/godot,Valentactive/godot,RandomShaper/godot,Brickcaster/godot,josempans/godot,tomreyn/godot,FateAce/godot,FateAce/godot,groud/godot,sanikoyes/godot,josempans/godot,BastiaanOlij/godot,okamstudio/godot,DmitriySalnikov/godot,Zylann/godot,Max-Might/godot,NateWardawg/godot,BastiaanOlij/godot,akien-mga/godot,okamstudio/godot,Valentactive/godot,Paulloz/godot,akien-mga/godot,exabon/godot,Shockblast/godot,vnen/godot,Marqin/godot,guilhermefelipecgs/godot,Shockblast/godot,Shockblast/godot,MrMaidx/godot,n-pigeon/godot,NateWardawg/godot,Shockblast/godot,sanikoyes/godot,ageazrael/godot,ZuBsPaCe/godot,Brickcaster/godot,ex/godot,ficoos/godot,akien-mga/godot,Paulloz/godot,MrMaidx/godot,zicklag/godot,BastiaanOlij/godot,zicklag/godot,godotengine/godot,ex/godot,pkowal1982/godot,ficoos/godot,Valentactive/godot,RandomShaper/godot,vnen/godot