- AdvertisementParser: stop the TLV scanner from aborting the whole
  packet on the BUSY tag (type 0x09, previously unrecognized), which
  silently dropped every source after the first nameless channel;
  recover PSID-only channels lacking FSID, fall back to "Channel N"
  when PSNM is absent, and surface the TYPE model code for devices
  seen only via Advertisement.
- MainWindow.xaml: replace the four toolbar icons that relied on the
  "Segoe MDL2 Assets" font (missing on Windows 7, rendered as tofu
  boxes) with plain vector Path/Ellipse shapes.
- LwrpScanner/NetworkScanner: fix two bugs causing the brute-force
  TCP/93 sweep to effectively never finish on a real /16 network —
  reverse-DNS lookups were fired for every swept address (not just
  responding hosts) and left running detached once a host failed to
  connect, and the 300ms per-command timeout was too short for real
  multi-line SRC responses, causing trailing lines to bleed into...