Allow focus on disabled buttons
Allow focus on disabled buttons

This behavior better matches other gui toolkits. A selected disabled
button still can't be interacted with but it can now be selected. This
seems to be what QT and GTK do also.

This fixes #16131

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