the 'mark all messages as read' context menu entry is disabled unless you deselect and then re-select folder of interest.
Steps to Reproduce:
1. start by selecting a folder that has no unread email.
2. right click on that folder after receiving email into it.
menu entry is disabled
the menu entry should be available if folder contains ANY unread email.
There is some problem with this action.
Git commit cbd9409c5f7c55dc50c4c2b1309c70ac9ab7f173 by Montel Laurent.
Committed on 22/12/2013 at 06:31.
Pushed by mlaurent into branch 'KDE/4.12'.
Fix Bug 328962 - menu entry 'mark all read' disabled
M +3 -0 kmail/kmmainwidget.cpp