Add list/table view for sessions panel alongside tiles view

- Toggle buttons (Tiles/List) in sessions header, preference
  persisted in localStorage
- List view: table with Name, Date, Duration, Messages, Mode, Actions
  columns; same fields and buttons as tiles, just tabular layout
- Refactored loadSessions() into buildGridHTML/buildListHTML helpers
  with shared attachSessionListeners() for both views
- i18n: Tiles, List, Name, Date, Duration, Messages, Mode, Actions
  keys added to LANG_RU
- Bump 1.22.6, SW cache v37->v38

simtrace2_pysniff/__init__.py

@@ -6,7 +6,7 @@ from .gsmtap import GsmtapSender, GsmtapReceiver
 from .pcap import PcapWriter
 from .dump import FileDumper, format_message
 
-__version__ = '1.22.5'
+__version__ = '1.22.6'
 __all__ = [
     'SniffSession',
     'DeviceDisconnected',