The mapping from aircraft URI to name was wrong for local (non-package)
aircraft, as spotted by Thorsten Renk. Note other data (thumbnail) is
still incorrect, but another change I have pending will replace this
code anyway so only doing the simple fix for now.
Updating the value takes immediately, as it did in 2017.1 and prior.
Additionally, passing —download-dir on the command-line is detected
and handled specially; the UI option is disabled, and no changes are
made to the value passed in. (The launcher does not override the value
with any value it has saved)
We now show paths in ‘view command line’ and set them through the
standard mechanism. Re-ordering the paths also notifies the rest of
the system correctly.
