Changes

Simulation support: added an addRun() method to our Simulation class
(#1523).
This is just about refactoring code at this stage…

Simulation support: can now add a new run (#1523).

Some minor cleaning up.

Revert "Some minor cleaning up."
This reverts commit 012ee5d4c09ce475d41120646187806dfdb7934f.

Some minor cleaning up.

Some minor cleaning up.

Some minor cleaning up.

Some minor cleaning up.

Simulation support: give access to all our data stores (#1523).

Some minor cleaning up.

Simplified our data store interface (#1523).

Some minor cleaning up.

Some minor cleaning up.

Some minor cleaning up.

Some minor cleaning up.

Some minor cleaning up.

CSV data store: support multiple data stores (#1523).

CSV data store: support multiple data stores (#1523).
Makes sure that we can output different runs with different point 
intervals, this without outputting the VOI.

CSV data store: support multiple data stores (#1523).
Makes sure that we can output different runs with different point 
intervals, this without outputting the VOI.

CSV data store: support multiple data stores (#1523).
Make sure that it builds fine on Windows.

Data store: always have a VOI (#1523).

Some minor cleaning up.

Some minor refactoring (#1523).

Data store interface: don't create a data store with a capacity anymore
(#1523).
Indeed, we want a data store to hold one or several runs, and those runs
may not all be of the same capacity (e.g. one run with a point interval
of 1 and another of 0.1, for the same starting and ending points).

Data store interface: don't pass all our data stores to DataStoreData
(#1523).

Data store interface: removed DataStores (#1523).

Some minor cleaning up.

Data store interface: slight change to the signature of our
DataStore::addVariables() method (#1523).

Data store interface: added the skeleton of an addRun() method to our
DataStore class (#1523).

Some minor cleaning up.

Some minor cleaning up.

Removed our resetList() method.
Only CellmlFile::reset() was really taking advantage of it.

Data store interface: added an addRun() method to our DataStoreVariable
class (#1523).

Data store interface: can now return the size of a given run (#1523).

Some minor cleaning up.

Data store interface: can now only add a variables / some variables to a
data store if no runs haven't already been added to it (#1523).

Data store interface: can now add and retrieve values (#1523).

Some minor cleaning up.

Data store interface: keep track of our data store in our DataStoreData
class (#1523).

Data store interface: some minor renaming (#1523).

Some minor cleaning up.

Some minor cleaning up.

CSV data store: now support multiple runs (#1523).

BioSignalML data store: can now re-export the last run (#1523).

BioSignalML data store: now support multiple runs (#1523).
Note that we don’t set the duration of our recording anymore since it 
may contain more than one run.

Some minor cleaning up.

Some minor cleaning up.

Simulation Experiment view: simplified our code a bit.

CSV data store: improved the progress of the export.

BioSignalML data store: improved the progress of the export.

Some minor cleaning up.

Some minor cleaning up.

Graph panel widget: added support for multiple runs (#1523).
Now, we ‘just’ need to make use of multiple runs from the 
SimulationExperiment view.

Simulation Experiment view: added initial support for multiple runs
(#1523).
There are still some strange things going on (e.g. to clear the 
simulation data doesn’t remove the plots…!?).

Graph panel widget: our runs are freed automatically, so no need to free
them ourselves (#1523).
Not only that, but it also prevents potential problems for trying to 
free them twice!

Simulation Experiment view: to clear our simulation data now reset all
our runs, not only the last one (#1523).

Graph panel widget: use the same symbols for different runs (#1523).

Some minor cleaning up.

Simulation support: don't try to create a data store for our results if
we don't have a runtime (#1523).

Simulation support: make sure that our results have a data store before
returning its size (#1523).

Some minor cleaning up.

Graph panel widget: make sure that a run has some data before using it
to compute our bounding rectangle (#1523).

Graph panel widget: make sure that our new default run (upon resetting
our runs) is properly customised (#1523).

Some minor cleaning up.

Graph panel widget: improved boundingRect() and boundingLogRect()
methods (#1523).

Some minor cleaning up.

Graph panel widget: show only one instance of a graph's legend (#1523).
Indeed, Qwt creates a legend widget for every single graph, which means 
that if we have three runs then we will have three legend widgets while 
we only want one of them.

Some minor cleaning up.

Some minor cleaning up.

Some minor cleaning up.

CSV data store: output the data of all the runs and not always that of
the last run (#1523).

Slight updates to our downloads and what is new pages (#1523).

Some minor cleaning up.

Graph panel widget: no space between our legend items (#1523).
Indeed, on macOS it was fine, but on Windows and Linux there was some 
space, which meant that after a few runs of 
doc/developer/functionalTests/res/sedml/noble_1962_local.sedml, we would
see a scrollbar for the two bottom graph panels (since they have 3
graphs each while the first graph panel has only one).