ASSERT Device A shows message thread with 55502 TestB at top left and Delete button at top right
On device A, press the Delete button
ASSERT Device A pops up a dialog Do you want to delete this entire thread? with buttons OK and Cancel
On device A, press OK button
ASSERT Device A returns to Serval Mesh Messages screen
ASSERT Device A does not display any entry for 55502 TestB
On device B, enter the word Again in the text field and press Send button
Wait a few seconds
ASSERT Device A sounds a notification
ASSERT Device A now displays an entry for 55502 TestB on the Serval Mesh Messages screen
On device A, press the 55502 TestB entry
ASSERT Device A displays message thread with 55502 TestB at top left, Delete button at top right, and a single Again message inside text bubble at lower right