Changed WindowsAccentMode (int32) Theme setting to ThemeBlurEnabled (boolean):

- Exposed a new function "SetBlurForWindow" in WindowIntelopHelper that handles the blur.
- Deleted Accent and Test themes
- Changed SimpleBlur and Base themes according to changes

Wox/MainWindow.xaml.cs

@@ -255,6 +255,7 @@ namespace Wox
 
             InitProgressbarAnimation();
             WindowIntelopHelper.DisableControlBox(this);
+            WindowIntelopHelper.SetBlurForWindow(this, UserSettingStorage.Instance.ThemeBlurEnabled);
             CheckUpdate();
         }