Dialog responsible Item component

Currently its possible to pass the amount of "columns" for actions that get presented in each row.
But the body is not affected from that attribute. Means if i want to have several items on a row, its not possible. As well i cant select "item" in the action as type. 

So a possibility to get several items on a row would be nice. Like making the body react to the "column" property or to add items like selectable input in the action property.

Example (That how its currently, but i want the items like the numbers from 1-10):
dialog show @p {type:"minecraft:multi_action",title:"Examples",
body:[{type:"minecraft:item",item:{id:"minecraft:acacia_sapling"},width:16,height:16},
{type:"minecraft:item",item:{id:"minecraft:allay_spawn_egg"},width:16,height:16}],
columns:5,actions:[{label:"1",width:32},{label:"2",width:32},{label:"3",width:32},{label:"4",width:32},{label:"5",width:32},
{label:"6",width:32},{label:"7",width:32},{label:"8",width:32},{label:"9",width:32},{label:"10",width:32}]}