The size of CloseButton presented in MetroTabItem will be changed proportionately considering its HeaderFontSize. In addition, an example has been added into MetroDemo project.
Add method SetTitle to ProgressDialogController
Extracted ProgressDialogController to seperate class.
Removed unused using declarations.
Revert "Removed unused using declarations."

This reverts commit 7af86a60168acf4cf1fee8c614e59927154047f3.
Merge pull request #1316 from xxMUROxx/ProgressDialog-SetTietle

Possibility to set title
Support for .NET 4.5.
Changed style of DataGridNumericUpDownColumn when Column has IsReadOnly=true.
The new behaviour is, that instead of IsEnabled, IsHitTestVisibile is set to false.
Now in a DG-NUD-C the Background of the column is transparent in DefaultElementStyle
[NUD] Padding property in NumericUpDown is now used
Remove MetroTabItemCloseButtonFontSizeConverter.
Merge pull request #1310 from oloopy/MetroTabItem-CloseButtonSize

The size of CloseButton in MetroTabItem will be changed proportionately.
Merge pull request #1335 from xxMUROxx/hotfix/MetroDataGridCheckBox

Changed style of DataGridNumericUpDownColumn