This changes the visibility of some methods, removes unnecessary
abstractions and fixes static import of GroupId constant.

Also fixed a couple of bugs.

This commit also moves various blog classes into their own packages and
makes the required visibility changes.

Add functionality to save and restore recently used Emojis

Update emoji and add new categories based on AOSP's XML file

Fixes #635

Closes #593

No more general disabling of abortOnError
Resolved all *errors* beside language ones  MissingTranslation & ImpliedQuantity
Issue context: #567

Briar crashed when run in a device without bluetooth or without camera
such as an emulator.

Closes #514

This refactors the forum invitation code,
so it can be used by both: forums and blogs.

Closes #517

Closes #559

Closes #553

This simple fix contributed by @m8r-v9bo74 fixed the issue on my Xperia
Pro that could never focus on the QR code before. Focusing and scanning
still works on my other test devices.

Closes #346