Mention `keep_pressed_outside` caveat in the BaseButton documentation
Mention `keep_pressed_outside` caveat in the BaseButton documentation

This closes #37790.

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