[UX] Footer: add option to set progress bar min width (#5757)
[UX] Footer: add option to set progress bar min width (#5757)

Allow progress bar to be seen when "Show all at once" enabled
and many items selected (text part will then be truncated).
koreader/koreader,pazos/koreader,mwoz123/koreader,NiLuJe/koreader,poire-z/koreader,Markismus/koreader,mihailim/koreader,Frenzie/koreader,Frenzie/koreader,poire-z/koreader,koreader/koreader,Hzj-jie/koreader,NiLuJe/koreader