When showing propagation task details stacktrace is reported instead

How to reproduce with test data:

1. create user and assign `resource-ldap`: the user is created fine
2. go to Topology > resource-ldap > Propagation Tasks: the expected task is there
3. click on the icon to display task details; the following stacktrace is reported instead:

org.apache.wicket.WicketRuntimeException: No get method defined for class: class org.apache.syncope.common.lib.to.PropagationTaskTO expression: right
at org.apache.wicket.core.util.lang.PropertyResolver.getGetAndSetter(PropertyResolver.java:500)
at org.apache.wicket.core.util.lang.PropertyResolver.getObjectAndGetSetter(PropertyResolver.java:351)
at org.apache.wicket.core.util.lang.PropertyResolver.getObjectAndGetSetter(PropertyResolver.java:254)
at org.apache.wicket.core.util.lang.PropertyResolver.getValue(PropertyResolver.java:104)
at org.apache.wicket.core.util.string.interpolator.PropertyVariableInterpolator.getValue(PropertyVariableInterpolator.java:65)
at org.apache.wicket.util.string.interpolator.VariableInterpolator.toString(VariableInterpolator.java:148)
at org.apache.wicket.Localizer.substitutePropertyExpressions(Localizer.java:586)
at org.apache.wicket.Localizer.getStringIgnoreSettings(Localizer.java:422)
at org.apache.wicket.Localizer.getString(Localizer.java:232)
at org.apache.wicket.model.StringResourceModel.getString(StringResourceModel.java:439)
at org.apache.wicket.model.StringResourceModel.getString(StringResourceModel.java:424)
at org.apache.wicket.model.StringResourceModel.load(StringResourceModel.java:617)
at org.apache.wicket.model.StringResourceModel.load(StringResourceModel.java:199)
at org.apache.wicket.model.LoadableDetachableModel.getObject(LoadableDetachableModel.java:134)
at org.apache.syncope.client.console.tasks.PropagationTasks$1.viewTask(PropagationTasks.java:49)
at org.apache.syncope.client.console.tasks.PropagationTasks$1.viewTask(PropagationTasks.java:42)

This likely happens because task.view in PropagationTasks:49 resolves into

Executions of task '${right.name}'