Fix Variable Q Binning from SANS User File

Replace PyEpics with CaChannel in GetLiveInstrumentValue

Discard preservation of events for monitor counts

Refs #0

Export SANS Table as CSV

Indirect Elwin - Load without history option

Follow changes in plotly

CodeEditor: Set executing state after the code has been retrieved

Restrict the Details window to only 1 instance

They appear to change the API in the javascript layer without fully
reflecting it in the documentation. This even affects the older python
API mantid uses.

Minor fix to absorption corrections

Columns in Matrix and Table workspace displays are now adjustable