Fixes leak in Animation Track editor
Fixes leak in Animation Track editor

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