Open an existing riskchart (if you do not want it)

When you want to open a Riskchart in Migri, you have the possibility to open it basing on project name, max number of runs, % of best runs and phase weighting.

Nevertheless, if you select the same number of runs as an existing riskchart related with the same project, Migri will open this old one, even if, for example, the observation or the phase weight are different.

I think that this is something that can create an obstacle in the regular workflow. In my personal experience, it happens quite often that I want to open a new riskchart on the same project, in order to see how a different observations file or a different phase weight influence the global misfit, and these operations happen more often than to open an existing riskchart. As the maximum number of caseruns, I use to put the number of runs that I actually run (let's say 1000). So if I want to open a new caserun with different conditions, I'll have to set another number (999). This can be a problem if you want to open a new riskchart on an old project, and it could take several attempts before you find a maximum number of runs that has not been used, because you do not remember the numbers that you used before!

So in my opinion, in order to open an existing riskchart it should be necessary to load it only using the loading button, and not the same number of considered runs.