CORE (8.38) Add test for multi-input scannables to ScannableGroupTest.
MXGDA-2164 highlight (with red background) that queue is paused

Requires concomitant MXGDA-2164 commit in gda-common-rcp.git
Merge remote-tracking branch '8.38' into 8.38
Merge branch '8.38' into gda-8.40

Conflicts:
	uk.ac.gda.core/src/gda/data/scan/datawriter/NexusDataWriter.java
	uk.ac.gda.core/src/gda/jython/JythonServer.java
	uk.ac.gda.core/src/gda/scan/MultithreadedScanDataPointPipeline.java
Merge branch 'gda-8.40' into gda-8.42

Conflicts:
	uk.ac.gda.core/src/gda/data/scan/datawriter/NexusDataWriter.java