Add new settings and update designer version

Add user settings: UseNative (default changed from True to False), BootPatchPath and BackupPath to App.config/Settings.settings, and expose BootPatchPath in Settings.Designer.cs. Also bump the SettingsSingleFileGenerator GeneratedCodeAttribute version to 18.4.0.0 and adjust related default values/formatting.

Author: mujianwu

UotanToolbox/App.config

@@ -14,6 +14,15 @@
             <setting name="Language" serializeAs="String">
                 <value />
             </setting>
+            <setting name="UseNative" serializeAs="String">
+                <value>False</value>
+            </setting>
+            <setting name="BootPatchPath" serializeAs="String">
+                <value />
+            </setting>
+            <setting name="BackupPath" serializeAs="String">
+                <value />
+            </setting>
         </UotanToolbox.Settings>
         <UotanToolbox.Properties.Settings>
             <setting name="IsLightTheme" serializeAs="String">

UotanToolbox/Settings.Designer.cs

@@ -9,7 +9,7 @@
       <Value Profile="(Default)" />
     </Setting>
     <Setting Name="UseNative" Type="System.Boolean" Scope="User">
-      <Value Profile="(Default)">True</Value>
+      <Value Profile="(Default)">False</Value>
     </Setting>
     <Setting Name="BootPatchPath" Type="System.String" Scope="User">
       <Value Profile="(Default)" />