Adding plot markers no longer raises error on early mpl versions

Create 1:1 spec-det map when message is missing

The accepted colours were in the form "CO", "C1", etc. which are not
supported in matplotlib versions < 2. Replace them with the
corresponding hex.

Fix case sensitivity in LoadInstrument

Fix comment in history

Added Besselfunction

Added unit tests for GroupTOFWorkspaces property

Sync instrument across components in the reflectometry GUI

Fixes case sensitivity in LoadInstrument; if the filename had
_Definition that does not follow the aforementioned case it would
instead embed the entire filename as the instrument. This was noticed in
the SANS workflow where they were fitting custom IDFs but other users
may have run into this.

Revert changed input parameters

Figure Options Legend Tab

Mark masked spectra in plots as masked numpy arrays

Create a script from a matplotlib figure

Poisson Cost Function

in line 400 `self.chunksize` has to be `self.chunkSize`

When subscription to the topic that provides the spectrum to detector ID
mapping fails or the message is otherwise not consumed generate a 1:1
mapping by loading the instrument before creating the buffers.

This is a slightly hacky solution in time for V20 beam time, the
spectrum to detector ID mapping may be later moved to the run start
message, making this easier to handle.

Fixes #26692

Delete the move/copy constructors because they should not be used - they
cause problems with the WorkspaceObserver base class members. Change the
tests to use a pointer to avoid requiring them.

Re #26536

Fix indexing bug in IndexPeak algorithms

This reverts commit a2c895aa.

SaveNexusESS complex mappings