8 tests are failing on linux that aren't on macOS and 1 test failing on both

On macOS, the
1) jalview.gui.AlignmentPanelTest.testresetIdWidth
is failing in the develop branch in testTask0.
In linux, the following additional (related) tests are also failing on the develop branch:

testTask0:
2) jalview.gui.AlignmentPanelTest.testGetVisibleWidth
3) jalview.gui.SeqCanvasTest.testCalculateWrappedGeometry_noAnnotations
4) jalview.gui.SeqCanvasTest.testCalculateWrappedGeometry_withAnnotations
5) jalview.gui.SeqPanelTest.testFindMousePosition_wrapped_scales_longSequence
6) jalview.project.Jalview2xmlTests.testStoreAndRecoverOverview
7) jalview.project.Jalview2xmlTests.testStoreAndRestoreIDwidthAndAnnotationHeight

testTask1:
8) jalview.gui.AnnotationLabelsTest2.testIdWidthChanges[0]
9) jalview.gui.AnnotationLabelsTest2.testIdWidthChanges[1]


The tests in linux desktop probably haven't been run for a while and it seems likely the same root cause for all these tests were introduced at the same time.