Errors when selecting some JS modules in project properties

[vrubezhny]

AERI Report: https://redhat.ctrlflow.com/reviewers#!/problems/577453c2e4b03c6ed09af1d6

Environment:
Devstudio 10.1.0.GA

Steps to reproduce:
I was able to reliably reproduce it using these steps:

1. Have JS project in workspace.
2. Open its preferences -> JavaScript -> Modules
3. Select Lint (no error)
4. Select some other module (no error)
5. Select Lint again (error)

The same steps could be used to reproduce it with AngularJS module, Closure module and maybe some others (haven't tried them all).

Stacktrace:
Bundle: org.eclipse.jface 3.12.0.v20160518-1929
Message: Problems occurred when invoking code from plug-in: "org.eclipse.jface".
Exception:
java.lang.IllegalArgumentException: Argument not valid
at org.eclipse.swt.widgets.TabItem.setControl(TabItem.java:291)
at tern.eclipse.ide.ui.controls.TernModulesBlock.refreshModule(TernModulesBlock.java:312)
at tern.eclipse.ide.ui.controls.TernModulesBlock.access$7(TernModulesBlock.java:307)
at tern.eclipse.ide.ui.controls.TernModulesBlock$4.selectionChanged(TernModulesBlock.java:268)
at org.eclipse.jface.viewers.Viewer$1.run(Viewer.java:158)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:155)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2191)
at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1229)
at org.eclipse.jface.viewers.CheckboxTableViewer.handleSelect(CheckboxTableViewer.java:308)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1258)
at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:242)
at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:236)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:405)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)