siatka jonowa bez marginesu
...
<ion-col class="ion-no-padding">
<ion-button class="ion-no-margin">Button</ion-button>
</ion-col>
...
Magnificent Mink
...
<ion-col class="ion-no-padding">
<ion-button class="ion-no-margin">Button</ion-button>
</ion-col>
...