[Fix] NumericUpDown correct background

Fixes #1083
TrackMouseWheelWhenMouseOver is defaulted to false and not true

Referenced #1081
Merge pull request #1085 from xxMUROxx/hotfix/NumericUpDown

[Fix] NumericUpDown correct background
minor
introduce MetroButtonCommandPasswordBox
introduce ButtonFontFamily attached property
use ButtonFontFamily attached property (TextBox)
renaming...

MetroButtonCommandPasswordBox ->MetroButtonPasswordBox
fix using new style key MetroButtonPasswordBox
renaming

ButtonCommandMetroTextBox -> MetroButtonTextBox
Merge pull request #1097 from MahApps/993-punker76-ButtonCommandMetroPasswordBox

introduce ButtonCommandMetroPasswordBox
ShowWindowCommandsOnTop for window buttons too

Hide Window button commands when ShowWindowCommandsOnTop is false.
Merge pull request #1098 from 100GPing100/patch-7

ShowWindowCommandsOnTop for window buttons
handle RightToLeft for check path
introduce ContentDirection attached property
example
Merge pull request #1100 from MahApps/1084-punker76-CheckBox-RightToLeft-Style

RightToLeft for CheckBox/RadioButton and Style for Content on left side (without setting RightToLeft)
doesn't set TextBlock style and foreground
introduce MetroPage style
Merge pull request #1102 from MahApps/1094-punker76-textblock-foreground

doesn't set TextBlock style and foreground