Sprite: Fix inspector not showing changes on "frame" property.
Sprite: Fix inspector not showing changes on "frame" property.

Fixes #6562

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