Fix canvas zoom controls lazy position update
Fix canvas zoom controls lazy position update

After hiding/showing rulers, zoom controls were kept at the wrong position until an update happened because of other reason.

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