Groups left collapsed menu now has a tooltip

Groups design changes: border now only around icon
Entry password reveal checkbox now works with XAML and converters

ModernKeePass/App.xaml

@@ -2,7 +2,7 @@
     x:Class="ModernKeePass.App"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    RequestedTheme="Dark">
+    RequestedTheme="Light">
     <Application.Resources>
         <Style TargetType="ToggleButton" x:Name="HamburgerToggleButton">
             <Setter Property="Template">