Description of problem:

When I select a VM and then click on the Network or Snapshots tab, uncaught exception pops up and it freezes the webadmin completely (I have to close the tab and log back in again).

Here is the snip from the UI log (debuginfo installed).

2016-10-14 12:56:55,014 ERROR [org.ovirt.engine.ui.frontend.server.gwt.OvirtRemoteLoggingService] (default task-20) [] Permutation name: 4A1BE3D2D2A24548A0D737A0737EBAB3
2016-10-14 12:56:55,015 ERROR [org.ovirt.engine.ui.frontend.server.gwt.OvirtRemoteLoggingService] (default task-20) [] Uncaught exception: com.google.gwt.core.client.JavaScriptException: (Error) 
 __gwt$exception: <skipped>: Syntax error, unrecognized expression: Speed <sub>(Mbps)</sub>
        at Unknown.s</ga.error(Unknown Source)
        at Unknown.s</ga.tokenize(Unknown Source)
        at Unknown.s</ga.select(Unknown Source)
        at Unknown.ga(Unknown Source)
        at Unknown..find(Unknown Source)
        at Unknown.m.fn.init(Unknown Source)
        at Unknown.m(Unknown Source)
        at org.ovirt.engine.ui.common.utils.JqueryUtils.getTextFromHtml(JqueryUtils.java:41)
        at org.ovirt.engine.ui.common.widget.table.ColumnResizeCellTable.$getColumnContextMenuTitle(ColumnResizeCellTable.java:413)
        at org.ovirt.engine.ui.common.widget.table.ColumnContextMenuItem.$update(ColumnContextMenuItem.java:75)
        at org.ovirt.engine.ui.common.widget.table.ColumnContextMenuItem.ColumnContextMenuItem(ColumnContextMenuItem.java:65)
        at org.ovirt.engine.ui.common.widget.table.ColumnContextMenu.$addItem(ColumnContextMenu.java:47)
        at org.ovirt.engine.ui.common.widget.table.ColumnResizeCellTable.$addColumn(ColumnResizeCellTable.java:199)
        at org.ovirt.engine.ui.common.widget.table.ColumnResizeCellTable.$addColumnWithHtmlHeader(ColumnResizeCellTable.java:254)
        at org.ovirt.engine.ui.common.widget.uicommon.vm.VmSnapshotInfoPanel.$initNicsTable(VmSnapshotInfoPanel.java:186)
        at org.ovirt.engine.ui.common.widget.uicommon.vm.VmSnapshotInfoPanel.VmSnapshotInfoPanel(VmSnapshotInfoPanel.java:45)
        at org.ovirt.engine.ui.common.widget.uicommon.vm.VmSnapshotListModelTable.VmSnapshotListModelTable(VmSnapshotListModelTable.java:65)
        at org.ovirt.engine.ui.webadmin.section.main.view.tab.virtualMachine.SubTabVirtualMachineSnapshotView.SubTabVirtualMachineSnapshotView(SubTabVirtualMachineSnapshotView.java:26)
        at org.ovirt.engine.ui.webadmin.section.main.view.tab.virtualMachine.com_gwtplatform_mvp_client_DesktopGinjector_DesktopGinjectorGinjector_fragment.$get_Key$type$org$ovirt$engine$ui$webadmin$section$main$view$tab$virtualMachine$SubTabVirtualMachineSnapshotView$_annotation$$none$$(com_gwtplatform_mvp_client_DesktopGinjector_DesktopGinjectorGinjector_fragment.java:136)
        at org.ovirt.engine.ui.webadmin.section.main.presenter.tab.virtualMachine.com_gwtplatform_mvp_client_DesktopGinjector_DesktopGinjectorGinjector_fragment.$get_Key$type$org$ovirt$engine$ui$webadmin$section$main$presenter$tab$virtualMachine$SubTabVirtualMachineSnapshotPresenter$_annotation$$none$$(com_gwtplatform_mvp_client_DesktopGinjector_DesktopGinjectorGinjector_fragment.java:923)
        at org.ovirt.engine.ui.webadmin.section.main.presenter.tab.virtualMachine.com_gwtplatform_mvp_client_DesktopGinjector_DesktopGinjectorGinjector_fragment$11$1.onSuccess(com_gwtplatform_mvp_client_DesktopGinjector_DesktopGinjectorGinjector_fragment.java:948)
        at com.google.gwt.core.client.impl.AsyncFragmentLoader.$onLoadImpl(AsyncFragmentLoader.java:569) [gwt-servlet.jar:]
        at com.google.gwt.core.client.impl.AsyncFragmentLoader.onLoad(AsyncFragmentLoader.java:275) [gwt-servlet.jar:]
        at com.google.gwt.core.client.impl.Impl.apply(Impl.java:296) [gwt-servlet.jar:]
        at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:335) [gwt-servlet.jar:]
        at Unknown.Tx/<(Unknown Source)
        at Unknown.anonymous(Unknown Source)
        at Unknown.webadmin/webadmin.__installRunAsyncCode(Unknown Source)
        at Unknown.__gwtInstallCode(Unknown Source)
        at com.google.gwt.core.client.impl.LoadingStrategyBase$RequestData.$tryInstall(LoadingStrategyBase.java:138) [gwt-servlet.jar:]
        at com.google.gwt.core.client.impl.ScriptTagLoadingStrategy.asyncCallback(ScriptTagLoadingStrategy.java:56) [gwt-servlet.jar:]
        at Unknown.anonymous(Unknown Source)
        at com.google.gwt.core.client.impl.Impl.apply(Impl.java:296) [gwt-servlet.jar:]
        at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:335) [gwt-servlet.jar:]
        at Unknown.Tx/<(Unknown Source)
        at Unknown.anonymous(Unknown Source)
        at Unknown.anonymous(Unknown Source)

Version-Release number of selected component (if applicable):

ovirt-engine-webadmin-portal-4.1.0-0.0.master.20161016231307.git8b0f508.el7.centos.noarch

How reproducible:

Always

Steps to Reproduce:
1. Select any VM
2. Click on Network interfaces or Snapshots tab

Additional info:

oVirt was upgraded from 3.6-snapshot to 4.0 and then to 4.1-master.