Main window: fix warning message formating

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Main window: Fix work dir examination

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Jobs: when displaying stacktrace, don't display just the file names instead of the whole file paths. It makes the stacktraces harder to read and even confusing sometimes

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Merge branch 'testing' into unstable