Added option to ignore applet (gamepad connection window will not appear when it is disconnected) (#40)

This option is under the hacks category for a reason; use if you know what you're doing.

src/Ryujinx/UI/Views/Settings/SettingsSystemView.axaml

@@ -238,6 +238,9 @@
                         ToolTip.Tip="{locale:Locale IgnoreMissingServicesTooltip}">
                         <TextBlock Text="{locale:Locale SettingsTabSystemIgnoreMissingServices}" />
                     </CheckBox>
+                    <CheckBox IsChecked="{Binding IgnoreApplet}">
+                        <TextBlock Text="{locale:Locale SettingsTabSystemIgnoreApplet}" />
+                    </CheckBox>
                 </StackPanel>
             </StackPanel>
         </Border>

src/Ryujinx/UI/Views/Settings/SettingsUIView.axaml

@@ -1,4 +1,4 @@
-<UserControl
+<UserControl
     x:Class="Ryujinx.Ava.UI.Views.Settings.SettingsUiView"
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"