When entering visual selection mode, the current selection is deleted.
This patch extends the visual mode behavior to select multiple blocks of
messages.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Separate the marking functions from the message store and extract the
marking behavior into its own class with tests.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>