Fix Blog Sharing Sessions

Closes #979

See merge request !566

to have all the code related to that in one place,
so it is easier to maintain and to spot bugs.

This also checks that only blogs without an existing sharing session
are shared and initialized again.
It extends an existing test to catch the missing check.

This removes some debugging information from the previous commit
to not leak private information via the sharing sessions.

Fixes #979

Protocol versioning for BTP

See merge request !557

Use fully-qualified class names in manifest

Closes #982

See merge request !565

This prevents a crash on Android 4 when the package name in build.gradle differs from the name in the manifest.

Create correct shareable for RSS blogs

Closes #977

See merge request !564

Block blog notifications when viewing combined feed

See merge request !563

Also removed "personal blog" wording that doesn't apply to RSS blogs.

Show Beta Expiry Warning

Closes #933

See merge request !559

Show a warning instead of throwing an error for unused translations

See merge request !561

Signed-off-by: goapunk <noobie@goapunks.net>

Set applicationId to match app_package

See merge request !560

Notify more aggressively

See merge request !555

* Add setting to show notification on the lockscreen
* Don't block notifications in the contact-/-group/-forum/-bloglist

Signed-off-by: goapunk <noobie@goapunks.net>

Revisit private group creation workflow

Closes #822

See merge request !553

Add test where two contacts remove each other

Closes #962

See merge request !558

Change app name and package name for beta release

Closes #106

See merge request !545

Handle RSS URLs case-insensitively

Closes #957

See merge request !544

Remove visibility indicators from private group join messages

Closes #951

See merge request !546

Use F-Droid's base Docker image

See merge request !556