Add two short-term todos.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
weechat-tracking: Fix Footer.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
weechat-tracking: Support different types for different buffers.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
weechat-tracking: Fix defcustom :type.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Add `weechat-max-nick-length': Option to truncate long nicknames.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>