MahApps/MahApps.Metro — pull request #1115 by Tide (2014-03-01 07:59:19+00:00)
Title: Adds #1088 - Creates properties to set column widths for BaseMetroDialog

This add the ability to set the width percentage for the BaseMetroDialog.
```
var settings = new MetroDialogSettings
{
AffirmativeButtonText = "yes",
NegativeButtonText = "no",
FirstAuxiliaryButtonText = "cancel",
DialogWidthPercentage = 70
};
```
My application is only 460 wide and it was cutting off half of the first button at that width. Adding this fixes that issue.