Abdullahi Usman authored Mar 25, 2018 and Georges Basile Stavracas Neto committed May 02, 2018

All events in month-popover displays hour-label indicating their start time,
but all-day events should not display their start time.

This is caused by gtk_widget_show_all recursively setting the events list-box
and all its childrens visible.

We replace gtk_widget_show_all with gtk_widget_show to show the events list-box
and its childrens.

#250


(cherry picked from commit c7f522ea)