gcal-window changes:
1. Added #GtkStackSwitcher for view-switching handling
2. Reworked view switching behavior
3. Added window states: search-mode, new-event-mode
4. Implemented search using #GtkSearchBar, allowing to handle [Esc] keys closing the search
5. Removed temporally SourcesView
gcal-application changes:
1. Added actions for [Search] and [New Event] with its keyboard-shorcut
A lot of ground work is set here, the code is fill with FIXMEs and comment
for stuff-TODO
Added GcalEventView::will-delete to let thw window knows about the change.
GcalWindow will handle the hiding of the event-widget till the notification goes
away or the user click "Undo".
Added method in GcalView interface to retrieve and event-widget by it's uuid.
Added some cosmetic changes in GcalMonthView as well.
Warning: this particular commit may not build.
Added GtkNotification widget migrated from gnome-contacts.
Added methods in GcalWindow to show a notification.
Erick Pérez Castellanos