Dialog-Buttons with vertical-Option has still margin-left in MD-Theme

[phoebusryan]

The issue exists in all versions of f7 (including v7)

Just go to the example:
https://framework7.io/docs/dialog#examples and click on the Button "Vertical-Buttons" in the Preview-Frame. The 2nd + 3th Button has margin-left of 4px in MD which leads to layoutissues in some cases.

Aurora uses this css:

aurora .dialog-buttons-vertical .dialog-button {
margin-left: 0;
flex-shrink: 0;
}

... and we should use the same for md :)