Added a visible difference between the enabled and disabled state of a menu item in a context menu.

I also removed the opacity from the text, so that the menu item text appears white instead of gray and it is easier to distinguish the two states.
Merge pull request #114 from flagbug/contextmenu-disabled-state

Added a visible difference between the enabled and disabled state of a menu item in a context menu.
Spun each implicit control style out to its own resource dictionary for developers sake. From the consumption point of view, nothing changes, still use Controls.xaml
Fixes #116 (watermark for editable comboboxes).
Added more contrast to the tab headers, as they were very hard to see, especially in the dark theme
Merge pull request #120 from flagbug/tab-header-contrast

Added more contrast to the tab headers, as they were very hard to see, especially in the dark theme
Disallow dragging down maximized window when ResizeMode is NoResize
Changed default binding on ProgressRing.IsActive and ToggleSwitch.IsChecked to TwoWay.
Merge pull request #122 from flagbug/noresize-dragging-fix

Disallow dragging down maximized window when ResizeMode is NoResize
Fixes #127, nested resource dictionaries with implicit styles doesn't load the implicit styles until a non-nested style is called
Merge remote-tracking branch 'origin/master'
Added support for toggling the automatic titlebar capitalization
Fix issue #129 - Application crashes when you hover over the minimize/maximize/close icons
Merge pull request #128 from scq/master

Added support for toggling the automatic titlebar capitalization, fixed #129
Fixes a problem when used with view first frameworks such as MVVMLight. Ensures that code executed in the dependency property callbacks is not executed before OnApplyTemplate, otherwise the bindings will fail because not all of the control parts will have been created.  
Fix for issue #138: changing window title
Merge branch 'pr/n140_Shazbot'
Merge branch 'pr/n132_palmtech'
Fixed #77, Windows 8's lack of dropshadows on loss of focus is replaced by adding a sibling border.
Fixed #135 where system menu items (restore/min/max) were enabled even if window had values set otherwise.