Fix button spacing, opacity simplification, gitignore cleanup

WindowsApp/App.xaml

@@ -0,0 +1,5 @@
+<Application x:Class="Gott.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             StartupUri="MainWindow.xaml">
+</Application>