I have a grid with an editable Column. When the user edits a cell, if the cursor is hovered on another cell, it loses focus. I removed the OverOnly attribute but now the "Undo" icon is not appearing when the cell is edited.
Here is the code:

    <ext:CommandColumn runat="server" Width="30">
         <Commands>
              <ext:GridCommand  ToolTip-Text="Reject row changes" CommandName="reject" Icon="ArrowUndo" />
         </Commands>
         <PrepareToolbar Handler="toolbar.items.get(0).setVisible(record.dirty);" />
         <Listeners>
             <Command Handler="record.reject();" />
         </Listeners>
    </ext:CommandColumn>
    <ext:ComponentColumn runat="server" Editor="true" OverOnly="true"   DataIndex="fieldlabel" Flex="5" Text="Label">
         <Component>
             <ext:TextField runat="server" />
         </Component>
     </ext:ComponentColumn>