margin ion-item
<ion-item class="ion-no-padding">
<ion-thumbnail>
<img class="imgmg" src="...">
</ion-thumbnail>
<h2>Text</h2>
</ion-item>
Frightened Fly
<ion-item class="ion-no-padding">
<ion-thumbnail>
<img class="imgmg" src="...">
</ion-thumbnail>
<h2>Text</h2>
</ion-item>