Loading guess file when adding new components

[Rafael Winck Espinoza]

When adding new components to a previous flowsheet it is not possible to load the previous guess file. I propose a change that allows this possibility, maybe loading some default values in the new matrix slots.

[Rafael de Pelegrini Soares]

On recent versions you can load results when the number of components is not the same.

This means that you will be able to load the results but the missing data probably will affect your solution.