- Also call wait_for_activities when asked for

- Call wait_ung_calendar_to_load when opening 'calendar' page
- Call wait_ung_listbox_to_load when opening 'ung' page

Because now this dialog is only rendered when user clicks to load it

Url used to get remaining activities

UNG Docs pagination also has an input, where user can enter the
page number he wants to go to. Test that this input also works,
by typing a number than pressing the enter key (code \13).

On UNG Calendar, test for some events that takes more than one day.

Test that on Day and Week view, UNG Calendar defines a red line to
mark current time.

Check the buttom today show current day.
Check the behaviour when using month, week and day views.

On Month and Week view, UNG Calendar defines diferent colors to current
day. Write a test to it.
Include a test for left top bar of month view, where the current day
is also maked (as blue).

Given refresh is done too quickly, also added a 'sleep' behaviour.

Test that clicking 'Refresh' button many times doesn't multiplicate
an event that was just created on interface.

Test if the buttons Month, Day, Week shows the appropriate calendar
including the date range at calendar bar (near by previous/next period
arrows).

Method create_calendar_event now support both start and end properties
of month, day and year.
It was also added the possibility to disable the behaviour "refresh untill
see event on calendar", to support the creation of events with
a date different from that selected under calendar to be shown.

When you click into UNG Calendar, a new event is created. This
test create multiple documents (one by one), by using click into UNG Calendar.

Should wait for calendar to be present before continuing, when
opening the 'calendar' page.

Test both start and stop properties of Month, Day and Year.

Make method wait for new event to be present on UNG Calendar before
continue.