Improve ensemble curve colors

* Use unique_ptr
* Improve default assignment of curve appearance
* Improve display of color tags in tree view items
* Select curve or ensemble instead of plot
* Only change curves connected to a Rim-object

* Improve color management for ensemble curves
Use a base color for statistics curves and set realization curves transparent
Make sure new curves are assigned a unique color
Harmonize how dropped addresses are handled

* Update all tags always
The update of tags for a subset of tree nodes is currently broken. Always update all tags.

* Add const

ApplicationLibCode/ProjectDataModel/Summary/RimEnsembleCurveSetColorManager.h

@@ -45,6 +45,7 @@ public:
     enum class ColorMode
     {
         SINGLE_COLOR,
+        SINGLE_COLOR_WITH_ALPHA,
         BY_ENSEMBLE_PARAM,
         BY_OBJECTIVE_FUNCTION,
         BY_CUSTOM_OBJECTIVE_FUNCTION
@@ -85,9 +86,8 @@ public:
                                    RimSummaryCase*                             summaryCase,
                                    caf::PdmPointer<RimCustomObjectiveFunction> customObjectiveFunction );
 
+    static bool hasSameColorForAllRealizationCurves( ColorMode colorMode );
+
 private:
     static const std::map<RimRegularLegendConfig::ColorRangesType, cvf::Color3ubArray> m_ensembleColorRanges;
-
-    static std::map<RimEnsembleCurveSetCollection*, int> m_nextColorIndexes;
-    static std::map<RimEnsembleCurveSetCollection*, std::map<RimEnsembleCurveSet*, RimRegularLegendConfig::ColorRangesType>> m_colorCache;
 };