[Timeshift] Fix: Blocked use from RC(etc) after "CreateAPSCFilesJob" (only when no debug-log enabled)

When a debug log is enabled or enigma2 started from the console is the
problem not present ???
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Example (same file):
--
no debug-log
-> time to create apsc-files 1:19 mins
--
with debug log
-> time to create apsc-files 2:57 mins (after 1:19 mins blocks any
remote command and after 2:57 mins is everything ok)
--
no debug-log (or with debug-log) and with the change
-> time to create apsc-files 1:19 mins
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The redirection to "/dev/nul" eliminates the problem, but not the cause.