BUG: Fix decimals in volumes module

Loading MRHEAD, we want the default coordinates to be:
 - spacing: 1.0, 1.0, 1.3
 - origin: -86.645, 133.929, 116.786 if the length unit precision is 3
Issues #2480, #2986, #3074...

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22212 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Block/Redirect display node events in CLI node writing

Closes #2966, #2915

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22213 3bd1e089-480b-0410-8dfb-8563597acbee