When displaying a *date* (as opposed to a *time*), pad the hour with blanks if necessary in order to get a consistent alignment.
When displaying a *date* (as opposed to a *time*), pad the hour with
blanks if necessary in order to get a consistent alignment.

Fix #7316

poire-z/koreader,NiLuJe/koreader,NiLuJe/koreader,poire-z/koreader,koreader/koreader,Frenzie/koreader,mwoz123/koreader,Frenzie/koreader,koreader/koreader,Hzj-jie/koreader