fix KeyError because packets were incorrectly being queried as an `…

…APRSPacket` from `aprslib` instead of `packetraven.packets`; individual callsign windows were never created

packetraven/gui.py

@@ -9,14 +9,14 @@
 from tkinter.ttk import Combobox, Separator
 from typing import Callable, Collection
 
-from aprslib.packets.base import APRSPacket
 from dateutil.parser import parse
 import numpy
 
 from packetraven import APRSDatabaseTable, APRSfi, RawAPRSTextFile, SerialTNC
 from packetraven.__main__ import DEFAULT_INTERVAL_SECONDS, LOGGER, retrieve_packets
 from packetraven.base import available_serial_ports, next_open_serial_port
 from packetraven.connections import APRSis, PacketGeoJSON
+from packetraven.packets import APRSPacket
 from packetraven.plotting import LivePlot
 from packetraven.predicts import PredictionError, get_predictions
 from packetraven.tracks import LocationPacketTrack, PredictedTrajectory