Old installs that once enabled the custom TLE/transceiver toggles kept
the legacy "https://example.com/tle.txt" placeholder in preferences.
Under the new "toggle replaces the online-update default source"
semantics this pointed the All/SatNOGS fetch at a dead URL and broke
satellite updates after upgrading to 4.4.8.
Migration in getDataSourcesSettings(): example.com placeholders are
replaced by the real default URLs (Celestrak All / SatNOGS) and the
toggles are forced OFF unless a non-default, real user URL is set.
Also disable the reset (loop) icon buttons while their toggle is off.
Verified: core:data tests pass, settings + app compile. Version stays
4.4.8 (覆盖 per user).
mckero
9a4ceddcb0