Add grip dots visual indicator to splitter bar

- ::after pseudo-element with radial-gradient dot pattern
- Dots darken on hover/active for contrast against accent background
- Bump 1.22.14, SW cache v45->v46

simtrace2_pysniff/__init__.py

@@ -6,7 +6,7 @@ from .gsmtap import GsmtapSender, GsmtapReceiver
 from .pcap import PcapWriter
 from .dump import FileDumper, format_message
 
-__version__ = '1.22.13'
+__version__ = '1.22.14'
 __all__ = [
     'SniffSession',
     'DeviceDisconnected',