[fix] Gesture manager: send TapForward event for page forward (#4658)
[fix] Gesture manager: send TapForward event for page forward (#4658)

Otherwise you can get rather unexpected results in paged media and scroll mode.

Workaround suggested by @NiLuJe here: https://github.com/koreader/koreader/pull/4570#discussion_r258693835
poire-z/koreader,Frenzie/koreader,koreader/koreader,koreader/koreader,poire-z/koreader,pazos/koreader,mihailim/koreader,NiLuJe/koreader,houqp/koreader,NiLuJe/koreader,Frenzie/koreader,Hzj-jie/koreader,Markismus/koreader,mwoz123/koreader