Sensitivity analysis when an ID has no decisions

[Miguel Ángel Artaso Landa]

In the scenario where sensitivity analysis is invoked with an ID that has no decisions, when displaying the plot or the map diagrams only a global scenario should be allowed.

[Miguel Ángel Artaso Landa]

With the help of Jorge Pérez, now the selector only displays the global scenario when the ID has no decisions. Commit https://bitbucket.org/cisiad/org.openmarkov.sensitivity-analysis.gui/commits/4ac99ab29d3a1959f207a136c8c9f2abd5d72a56