+DataSourcesTree_OnSymbolSelected(): while with Script, change the symbol (save Strategy) & backtest

+PopulateSliders() in WorkspaceLoad() for-active-chart after-restart-deserialization
+StrategyCompileActivateBeforeShow() in handleClassesWithGetPersistStringOverridden() doesn't complain I_WONT_COMPILE for Strategy.ActivatedFromDll