As a product decision it was decided that foreign notifications
cannot be 'mark all read' for their internal items.
Bug: T121930
Change-Id: I79292401b69adc4fad601192009296e02e8410b5
Have the group item expand itself not only when clicking the literal
'expand' button, but also when we click the entire item itself, as
if to open the notification item.
Renamed the expanding method so it is not specific for the button
event alone; also renamed the 'toggleExpand' to 'toggleExpanded',
as it toggles the inner 'expanded' state withot the API request
expansion process.
Bug: T121929
Change-Id: Iac23e06d1c17be4e1c5f63663fb0f81261f50070
* Add the ability to use bundled expandable
notification groups
* Display bundled cross-wiki notifications following
the design
Bug: T115419
Bug: T115423
Bug: T115422
Change-Id: I8c3eba6d627c3f06d51d74fc9774e3fc2d02915d
