CmdPal: Remove transition animation from filter drop-down and set minimum width (#41832)

## Summary of the Pull Request

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## PR Checklist

- [x] Closes: #41651 
- [ ] **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

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## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed

src/modules/cmdpal/Microsoft.CmdPal.UI/Controls/FiltersDropDown.xaml

@@ -68,6 +68,7 @@
     <ComboBox
         Name="FiltersComboBox"
         x:Uid="FiltersComboBox"
+        MinWidth="200"
         VerticalAlignment="Center"
         ItemTemplateSelector="{StaticResource FilterTemplateSelector}"
         ItemsSource="{x:Bind ViewModel.Filters, Mode=OneWay}"

src/modules/cmdpal/Microsoft.CmdPal.UI/Pages/ShellPage.xaml

@@ -327,11 +327,6 @@
                         x:Name="FiltersDropDown"
                         HorizontalAlignment="Right"
                         CurrentPageViewModel="{x:Bind ViewModel.CurrentPage, Mode=OneWay}" />
-                    <Grid.Transitions>
-                        <TransitionCollection>
-                            <RepositionThemeTransition />
-                        </TransitionCollection>
-                    </Grid.Transitions>
                 </Grid>
             </Grid>
 

src/modules/cmdpal/ext/SamplePagesExtension/Pages/SampleDynamicListPage.cs

@@ -70,7 +70,7 @@ public partial class SampleFilters : Filters
         [
             new Filter() { Id = "all", Name = "All" },
             new Filter() { Id = "mod2", Name = "Every 2nd", Icon = new IconInfo("2") },
-            new Filter() { Id = "mod3", Name = "Every 3rd", Icon = new IconInfo("3") },
+            new Filter() { Id = "mod3", Name = "Every 3rd (and long name)", Icon = new IconInfo("3") },
         ];
     }
 }