Actifsource - #6782 [Bug/TplEd] Exception after delete text inside read only template line function

Release: Actifsource V11.1.0

ch.actifsource.util.AssertionFailure?: param was null

    at ch.actifsource.util.Assert.fail(Assert.java:41)
    at ch.actifsource.util.Assert.assertNotNull(Assert.java:306)
    at ch.actifsource.util.Assert.assertNotNull(Assert.java:313)
    at ch.actifsource.util.ObjectUtil?.checkForNull(ObjectUtil?.java:96)
    at ch.actifsource.ui.elementtexteditor.editor.ElementTextEditor?.getKeyHandler(ElementTextEditor?.java:557)
    at ch.actifsource.ui.elementtexteditor.editor.ElementTextEditorScope?.getKeyHandler(ElementTextEditorScope?.java:240)
    at ch.actifsource.ui.component.impl.AbstractElementText?$2.delete(AbstractElementText?.java:375)
    at ch.actifsource.ui.component.impl.Root$2$1$1.execute(Root.java:728)
    at ch.actifsource.ui.component.impl.Root$2.executeFocusChangingAction(Root.java:706)
    at ch.actifsource.ui.component.impl.Root$2$1.doExecuteOn(Root.java:723)
    at ch.actifsource.ui.component.impl.Root$2$1.doExecuteOn(Root.java:1)
    at ch.actifsource.core.job.WriteJob?.executeOn(WriteJob?.java:71)
    at ch.actifsource.core.resourcepool.Modifiable.execute(Modifiable.java:270)
    at ch.actifsource.core.resourcepool.ResourcePool?.saveExecuteWriteJob(ResourcePool?.java:803)
    at ch.actifsource.core.resourcepool.ResourcePool?.saveTransactionalExecuteWriteJob(ResourcePool?.java:770)
    at ch.actifsource.core.resourcepool.ResourcePool?.execute(ResourcePool?.java:731)
    at ch.actifsource.core.session.AbstractWriteSession?.executeInternal(AbstractWriteSession?.java:319)
    at ch.actifsource.core.session.AbstractWriteSession?.executeInternal(AbstractWriteSession?.java:257)
    at ch.actifsource.environment.session.GuiSession?.executeInternal(GuiSession?.java:156)
    at ch.actifsource.core.session.AbstractWriteSession?.execute(AbstractWriteSession?.java:152)
    at ch.actifsource.environment.session.EditorSession?$2.doExecuteOn(EditorSession?.java:107)
    at ch.actifsource.core.job.WriteJob?.executeOn(WriteJob?.java:71)
    at ch.actifsource.core.resourcepool.Modifiable.execute(Modifiable.java:270)
    at ch.actifsource.core.resourcepool.ResourcePool?.saveExecuteWriteJob(ResourcePool?.java:803)
    at ch.actifsource.core.resourcepool.ResourcePool?.saveTransactionalExecuteWriteJob(ResourcePool?.java:770)