improving agenda/events

Show events by month
Event list now only show 10 events when listing events for month
(events for a day still listing all events)
Add information on indefined place
Enhance layout

(ActionItem2587)

Signed-off-by: Marcos Ramos <ms.ramos@outlook.com>
Signed-off-by: Arthur Del Esposte <arthurmde@yahoo.com.br>
Signed-off-by: Luiz Matos <luizff.matos@gmail.com>
Signed-off-by: Carlos Andre <carlos.andre.souza@msn.com>
Signed-off-by: Leandro Alves <leandrosustenido@gmail.com>
Signed-off-by: Tales Martins <tales.martins@gmail.com>
Signed-off-by: David Carlos <ddavidcarlos1392@gmail.com>
Signed-off-by; Gabriela Navarro <navarro1703@gmail.com>