MainWindow: AllowsTransparency set to True

WindowIntelopHelper: Added accent handling
SettingsWindow: Added combobox with accent selector to Theme tab (not functional yet)
Languages: Added entries for accent colors (all are in english for now)

[TEMP] Blur and Accent themes experiments
[TEMP] blur set in mainwindow on load.

Wox/MainWindow.xaml.cs

@@ -207,6 +207,7 @@ namespace Wox
             InitialTray();
 
             Closing += MainWindow_Closing;
+            
 
         }
 
@@ -255,6 +256,7 @@ namespace Wox
 
             InitProgressbarAnimation();
             WindowIntelopHelper.DisableControlBox(this);
+            WindowIntelopHelper.EnableBlur(this);
             CheckUpdate();
         }