Input element doesn't go to another line if no space left

[twinssbc]

If the tags happen to occupy the whole line (no more, no less), I think the width of the input element should be the whole itemList width, so that the input can go to another line. But the actual input element width is 0, so nothing can be inputted.

According to the method "publishInnerWidth" in Ext.ux.layout.component.field.BoxSelectField,

publishInnerWidth:function(ownerContext) {
    var me = this,
        owner = me.owner,
        width = owner.itemList.getWidth(true) - 10,
        lastEntry = owner.inputElCt.prev(null, true);

    if (lastEntry && !owner.stacked) {
        lastEntry = Ext.fly(lastEntry);
        width = width - lastEntry.getOffsetsTo(lastEntry.up(''))[0] - lastEntry.getWidth();
    }

    if (!me.skipInputGrowth && (width < 35)) {
        width = width - 10;
    } else if (width < 1) {
        width = 1;
    }
    ownerContext.inputElCtContext.setWidth(width);
}

The width will be negative, so the input element width will be 0. Probably change it to the below lines? Thanks!

   if (!me.skipInputGrowth && (width < 35)) {
        width = {itemListWidth} - 10;
    }