[a11y] Not able to close the calendar window of the panel calendar indicator

[Alejandro Piñeiro]

PRECONDITIONS
  * a11y enabled
  * using orca

STEPS TO REPRODUCE IT
  * Press F10 to give the focus to the panel
  * Move to the calendar indicator (current time is speeched)
  * Move down until you get into the calendar

EXPECTED OUTCOME
  * Be able to get out of the calendar, or close the window, in order to select other indicator on the panel or to give back the focus to unity

ACTUAL OUTCOME
   * When the focus is on the calendar, when you move up-down-left-right, you are moving along the days
   * Of course, this is not speeched at all, but this is an old GtkCalendar bug:
       * https://bugzilla.gnome.org/show_bug.cgi?id=321123
   * Anyway, although GtkCalendar is not accessible, it is clear that it would be required to somehow close that window. Right now Im not able to get out of the calendar (no keys, Esc, Tab etc) although probably I'm wrong

EXTRA INFORMATION

Detected while reviewing this merge proposal: https://code.launchpad.net/~rodrigo-moya/unity/fix-740360/+merge/55319

[Alejandro Piñeiro (apinheiro)]

After a quick talk with Rodrigo, we concluded that we should move this to the indicator-datetime project