This reverts commit 0e379fa5.

This reverts commit 2e3e5c70.

This reverts commit 3ab9b121.

There were several issues. First, there were two signal updates happening
at the same time: one from MantidUI and another from
AlgorithmSelectorWidget. Secondly, the AlgorithmSelectorWidget was
receiving a Poco::Notification from a separate thread and not dispatching
it to the GUI thread but instead calling update directly.

This reverts commit 86fcf7ca.

for those files that do not have a 1:1 detector mapping.

The smallest HYS event NeXus file with monitors is /SNS/HYS/IPTS-7964/0/12467/NeXus/HYS_12467_event.nxs, 4.1M.

 (e.g. bank01 to bank1) in HYSPEC IDF to be consistent with NeXus files.

The workspace title is now on the ImageView title bar.
Since the workspace is not changed, replaced
MatrixWorkspace_sptr by MatrixWorkspace_const_sptr
refs #6132