Bug: The timeplot works only when layers name are standard

[tudorbarascu]

For the simplest example, tank emptying in a pipe, if the layers name are other than junctions, tanks & pipes, the simulation runs by matching in the algorithm options which is who.
However, if the layer names are not standard, the timeplot graph doesn't work.

[vmora]

This is the way I found to determine what should be drawn (velocity or pressure) depending on the selected layer (tank, pipe, junction...).

A cleaner solution would be to test the layer fields and "guess" what layer it is depending on it's fields, independently of the name.