Ava UI: Input Menu Refactor (#5826)

* Refactor

* Apply suggestions from code review

Co-authored-by: Ac_K <Acoustik666@gmail.com>

* Update src/Ryujinx/UI/Views/Settings/SettingsHotkeysView.axaml.cs

Co-authored-by: Ac_K <Acoustik666@gmail.com>

* Update src/Ryujinx.Input/ButtonValueType.cs

Co-authored-by: Ac_K <Acoustik666@gmail.com>

* Add empty line

* Requested renames

* Update src/Ryujinx/UI/Views/Settings/SettingsHotkeysView.axaml.cs

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

* Make parent models private readonly

* Fix ControllerInputView

* Make line shorter

* Mac keys in locale

* Double line break

* Fix build

* Get rid of _isValid

* Fix potential race condition

* Rename HasAnyButtonPressed to IsAnyButtonPressed

* Use switches

* Simplify enumeration

---------

Co-authored-by: Ac_K <Acoustik666@gmail.com>
Co-authored-by: gdkchan <gab.dark.100@gmail.com>
Co-authored-by: TSR Berry <20988865+TSRBerry@users.noreply.github.com>

src/Ryujinx/Assets/Styles/Styles.xaml

@@ -15,8 +15,7 @@
                             <MenuItem Header="Test 2" />
                             <MenuItem Header="Test 3">
                                 <MenuItem.Icon>
-                                    <CheckBox Margin="0"
-                                              IsChecked="{ReflectionBinding Checkbox, Mode=TwoWay}" />
+                                    <CheckBox Margin="0" />
                                 </MenuItem.Icon>
                             </MenuItem>
                         </MenuItem>
@@ -393,4 +392,4 @@
         <x:Double x:Key="ContentDialogMaxWidth">600</x:Double>
         <x:Double x:Key="ContentDialogMaxHeight">756</x:Double>
     </Styles.Resources>
-</Styles>
+</Styles>