<style>
    .images-widget {
        border: 1px solid #888;
        margin: 10px;
        box-shadow: 5px 5px 6px #888;
        text-align: center;
    }
</style>
<div ng-controller="ImageWidgetController" class="images-widget">
    <div ng-show="isDisplaying">
        <img ng-src="{{ imageUrl }}"/>
    </div>
    <div ng-show="isEditing" class="" style="padding: 10px;">
        <fieldset>
            <label for="imageUrl" style="float: left;">URL de la imagen</label>
            <input type="input" name="imageUrl" ng-model="inputImageUrl" style="width: 400px;">
        </fieldset>
    </div>
</div>

<style>
    .images-widget {
        border: 1px solid #888;
        margin: 10px;
        box-shadow: 5px 5px 6px #888;
        text-align: center;
    }
</style>
<div ng-controller="ImageWidgetController" class="images-widget">
    <div ng-show="isDisplaying">
        <img ng-src="{{ imageUrl }}" style="max-width: 650px;"/>
    </div>
    <div ng-show="isEditing" class="" style="padding: 10px;">
        <fieldset>
            <label for="imageUrl" style="float: left;">URL de la imagen</label>
            <input type="input" name="imageUrl" ng-model="inputImageUrl" style="width: 400px;">
        </fieldset>
    </div>
</div>

Change html for image widget
Change html for image widget
