Since 1) debug output logging via the prefs isn't necessarily possible
for startup errors in Standalone, 2) real-time output is prohibitively
slow and has a miniscule scrollback buffer on Windows unless you use a
Cygwin or Git terminal, and 3) copying/pasting/emailing was annoying
anyway, make -ZoteroDebug open a popup window that shows errors and
debug output and allows submitting straight to the server with a Debug
ID.
This should replace the existing debug output viewer as well, but that's
less of a priority.
-ZoteroDebugText or the debug.log pref can still be used to dump to the
terminal.
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