v1.0.3 — Mobile radar icon in the time column header

Added: With the mobile flat view from v1.0.2, there was no longer a per group strip to click on for the vehicle radar. This release puts the radar icon back into the mobile time column header on the left of Abfahrt so the radar modal stays reachable. The icon picks up a brightness(0) filter so it reads in plain black against the lightGray header strip and matches the column labels next to it.

Implementation: bumps the weilSieDichLieben submodule to pick up 6b5a2d1, open upstream as NikBLN/weilSieDichLieben#54.