[Settings] UX fixes (#45513)

## Summary of the Pull Request

This PR includes:
- UI improvements to the Mouse Without Borders settings page.
- UI improvements to the AOT settings page.
- Multiple small fixes (e.g. to enable proper disabled states)
- Using GH Copilot CLI to loc strings that were hardcoded.
- Using GH Copilot CLI to remove dead loc strings from `Resources.resw`
(@jay-o-way will appreciated this 😁):

<img width="606" height="245" alt="image"
src="https://github.com/user-attachments/assets/aeab1201-1129-4ac9-a714-ac5ea7a227cc"
/>


## PR Checklist

- [x] Closes: #41688
- [x] Closes: #32869
- [x] Closes: #36200

<!-- - [ ] Closes: #yyy (add separate lines for additional resolved
issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

---------

Co-authored-by: Jiří Polášek <me@jiripolasek.com>

src/settings-ui/Settings.UI/SettingsXAML/Views/AdvancedPastePage.xaml

@@ -104,7 +104,7 @@
                             </tkcontrols:SettingsExpander.Description>
                             <tkcontrols:SettingsExpander.ItemsHeader>
                                 <tkcontrols:SettingsCard x:Uid="AdvancedPaste_ModelProviders" Style="{StaticResource DefaultSettingsExpanderItemStyle}">
-                                    <Button Content="Add model" Style="{StaticResource AccentButtonStyle}">
+                                    <Button x:Uid="AdvancedPaste_AddModelButton" Style="{StaticResource AccentButtonStyle}">
                                         <Button.Flyout>
                                             <MenuFlyout x:Name="AddProviderMenuFlyout" Opening="AddProviderMenuFlyout_Opening" />
                                         </Button.Flyout>
@@ -431,7 +431,6 @@
         <ContentDialog
             x:Name="PasteAIProviderConfigurationDialog"
             x:Uid="AdvancedPaste_EndpointDialog"
-            Title="Paste with AI provider configuration"
             Closed="PasteAIProviderConfigurationDialog_Closed"
             PrimaryButtonClick="PasteAIProviderConfigurationDialog_PrimaryButtonClick"
             PrimaryButtonStyle="{ThemeResource AccentButtonStyle}">
@@ -533,7 +532,6 @@
                             MinHeight="76"
                             HorizontalAlignment="Stretch"
                             AcceptsReturn="True"
-                            Header="System prompt"
                             Text="{x:Bind ViewModel.PasteAIProviderDraft.SystemPrompt, Mode=TwoWay}"
                             TextWrapping="Wrap" />
                         <Grid
@@ -549,9 +547,9 @@
                             Spacing="8">
                             <TextBox
                                 x:Name="PasteAIModelPathTextBox"
+                                x:Uid="AdvancedPaste_ModelPath"
                                 MinWidth="200"
                                 HorizontalAlignment="Stretch"
-                                Header="Model path"
                                 PlaceholderText="C:\Models\phi-3.onnx"
                                 Text="{x:Bind ViewModel.PasteAIProviderDraft.ModelPath, Mode=TwoWay}" />
                             <Button