[Settings] Various UX tweaks (#2822)

* Updated the add button styles to a standard used in W10 settings

* Updated the "About this feature" text to About [Module name]

* Set larger changes to the Shortcut Guide opacity numberbox

* Re-organised the General page

* Improved width of the add button so it's inline with the corresponding listview.

* Seperated warning label from header. Re-organised general settings

* Consistent formatting of the word 'administrator'

* Typo fix

* Warning text is collapsed when the user runs the app as admin

* Removed underline of version number

* XAML fix

src/core/Microsoft.PowerToys.Settings.UI/Views/PowerLauncherPage.xaml

@@ -136,7 +136,7 @@
             Grid.Column="1">
 
             <TextBlock 
-                Text="About this feature"
+                x:Uid="About_PowerLauncher"
                 Style="{StaticResource SettingsGroupTitleStyle}"
                 Margin="{StaticResource XSmallBottomMargin}"/>
 
@@ -149,7 +149,7 @@
             </HyperlinkButton>
 
             <TextBlock 
-                Text="Attribution"
+                x:Uid="AttributionTitle"
                 Style="{StaticResource SettingsGroupTitleStyle}" />
 
             <HyperlinkButton NavigateUri="https://github.com/Wox-launcher/Wox/">