[XASObjectViewer] add baseline plot optional regarding the silx version

4 jobs for update_0_2 in 4 minutes and 43 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #45936
test:python3.5-stretch-pyqt5_larch

00:02:35

passed #45935
test:python3.5-stretch-pyqt5_pymca

00:04:29

passed #45937
test:python3.5-stretch-pyqt5_pymca_larch

00:04:43

passed #45938
test:test-xas-tutorials_pymca

00:03:20