XAS: Fixes to Command Queue Made with Paul G on B18. 
Symptoms:
Could not stop command queue with command queue stop.
Could not move commands around with mouse or remove scans when a scan is
running.
XAS-111 ensure that the correct scan is selected and associated editors
are opened after creating/repeating/duplicating a scan

Also rename one protected method so that the name is more meaningful.
daserver: fix to infinite loop. + comment on an improvement
Script controller: Reduced update time from 100 to 10 to allow Qexafs
scans to update correctly.
Simple Scan: added go button
Merge remote-tracking branch 'origin/8.30.b18.oct'

Conflicts:
	uk.ac.gda.core/src/gda/scan/ContinuousScan.java
	uk.ac.gda.core/src/gda/scan/ScanBase.java