[JOHNNYFIVE-45] Now the size of the ImageViews added to the grid are not a fixed one, it depends on the size of the image used as source/background. When there is not more space for another image, the grid center its views. Resize the current images in the grid to the size of the biggest image in the view. And if the biggest image is deleted, resize them again. Now, the grid draws his children (the ImageViews) depending on the padding assigned to the grid.