Style tweaks: move some sub-menus to first-level menu (#4384)
Style tweaks: move some sub-menus to first-level menu (#4384)

We don't need that first-level menu to be short
as it contains no tweak itself (only the submenus
with toggable tweaks need to be kept shorter to
let room below to see the tweak effects).
poire-z/koreader,poire-z/koreader,houqp/koreader,pazos/koreader,NiLuJe/koreader,mihailim/koreader,koreader/koreader,Frenzie/koreader,Hzj-jie/koreader,Markismus/koreader,koreader/koreader,NiLuJe/koreader,mwoz123/koreader,Frenzie/koreader