The section titles usually don't provide a lot of value - messages
themselves are usually pretty unambiguous about their type, and
having a hidden shortcut to some settings panel or application isn't
essential either - except when showing the selected date when browsing
other days, as it adds context to the listed events. Based on that,
remove the section title as a general MessageListSection feature and
move it into the EventsSection, where we only show it when it is useful.
https://bugzilla.gnome.org/show_bug.cgi?id=775763
The latest mockups contain a button to clear all sections at once.
As some elements cannot be cleared, we need to provide that information
to avoid offering an action that has no effect.
https://bugzilla.gnome.org/show_bug.cgi?id=775763
We lost media controls outside of notification banners when
implementing the new notification designs. Reimplement this
functionality as a dedicated "Media" section in the message
list based on MPRIS.
https://bugzilla.gnome.org/show_bug.cgi?id=756491
Currently both the base classes for messages/sections and the message
list itself that instantiates the available sections are located in
the same module. As a result, it isn't possible to define sections
in a different module without introducing circular dependencies. The
Calendar module is already unwieldily large, so split it up a bit to
avoid it growing even bigger in the future.
https://bugzilla.gnome.org/show_bug.cgi?id=756491
