Description of problem:

There is an uncaught exception in the Admin Portal, in a Host 'Network Interfaces'

2023-03-16 16:32:04,727-04 ERROR [org.ovirt.engine.ui.frontend.server.gwt.OvirtRemoteLoggingService] (default task-461) [] Uncaught exception: com.google.gwt.core.client.JavaScriptException: (
TypeError) : Cannot read properties of null (reading 'e')
        at java.math.Elementary.add(Elementary.java:52)
        at org.ovirt.engine.ui.webadmin.widget.host.HostNetworkInterfaceBondedListViewItem$8.$getValue(HostNetworkInterfaceBondedListViewItem.java:167)
        at org.ovirt.engine.ui.webadmin.widget.host.HostNetworkInterfaceBondedListViewItem$8.getValue(HostNetworkInterfaceBondedListViewItem.java:167)
        at com.google.gwt.user.cellview.client.Column.render(Column.java:164)
        at com.google.gwt.user.cellview.client.AbstractCellTableBuilder.$renderCell(AbstractCellTableBuilder.java:188)
        at com.google.gwt.user.cellview.client.DefaultCellTableBuilder.$buildRowImpl(DefaultCellTableBuilder.java:62)
        at com.google.gwt.user.cellview.client.AbstractCellTableBuilder.$buildRow(AbstractCellTableBuilder.java:85)
        at com.google.gwt.user.cellview.client.AbstractCellTable.$buildRowValues(AbstractCellTable.java:2350)
        at com.google.gwt.user.cellview.client.AbstractCellTable.replaceAllChildren(AbstractCellTable.java:2149)
        at com.google.gwt.user.cellview.client.AbstractHasData$View.replaceAllChildren(AbstractHasData.java:265)
        at com.google.gwt.user.cellview.client.HasDataPresenter.$resolvePendingState(HasDataPresenter.java:1062)
        at com.google.gwt.user.cellview.client.HasDataPresenter$2.execute(HasDataPresenter.java:981)
        at com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:167)
        at com.google.gwt.core.client.impl.SchedulerImpl.$flushFinallyCommands(SchedulerImpl.java:272)
        at com.google.gwt.core.client.impl.Impl.exit(Impl.java:383)
        at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:345)
        at Unknown.eval(webadmin-0.js)

The host has bond slaves, and the exception happens if rx_drop and tx_drop for the bond are still empty:

   165	        TextColumn<HostInterface> dropRate = new TextColumn<HostInterface>() {
   166	            @Override
   167	            public String getValue(HostInterface hostInterface) {
   168	                return String.valueOf(hostInterface.getRxDrop().add(hostInterface.getTxDrop()));     <---- trying to add Tx and Rx drop stats to the UI elements
   169	            }
   170	        };

As long as the host is up, they will never be empty. But there is a specific scenario it can happen:
1. Prepare new host
2. Configure all networks manually before add
3. Add host to RHV-M, uncheck Activate after install button
4. Navigate to Network Interfaces in the UI

Version-Release number of selected component (if applicable):
4.5.3

How reproducible:
100%

Steps to Reproduce:
1. Get the host in maintenance
2. Set tx_drop rx_drop for a bond slave nic in vds_interface_statistics

Actual results:
* Exception

Expected results:
* Working UI

Additional info:
* Activating the host makes the problem go away, as getStats fills those rows.