refactor: Upgrade MudBlazor to v7

Directory.Packages.props

@@ -16,7 +16,7 @@
     <PackageVersion Include="FluentValidation" Version="11.9.2" />
     <PackageVersion Include="Flurl.Http" Version="4.0.2" />
     <PackageVersion Include="GitVersion.MsBuild" Version="6.0.0-rc.1" PrivateAssets="All" />
-    <PackageVersion Include="MudBlazor" Version="6.20.0" />
+    <PackageVersion Include="MudBlazor" Version="7.0.0" />
     <PackageVersion Include="ReactiveUI.Blazor" Version="20.1.1" />
     <PackageVersion Include="Serilog" Version="4.0.0" />
     <PackageVersion Include="Serilog.AspNetCore" Version="8.0.1" />

src/Recyclarr.Gui/Shared/MainLayout.razor

@@ -1,6 +1,7 @@
 @inherits LayoutComponentBase
 
 <MudThemeProvider IsDarkMode="true" />
+<MudPopoverProvider />
 <MudDialogProvider />
 <MudSnackbarProvider />