fix(installer): add missing file to csproj

Author: thenextman

package/WindowsManaged/DevolutionsGateway.csproj

@@ -37,8 +37,11 @@
     <Reference Include="System.Windows.Forms" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Update="Controls\FileBrowseButton.cs">
+      <SubType>Component</SubType>
+    </Compile>
     <Compile Update="Dialogs\NgrokListenersDialog.cs" />
-    <Compile Update="Dialogs\PublicKeyServerDialog.cs"/>
+    <Compile Update="Dialogs\PublicKeyServerDialog.cs" />
     <Compile Update="Dialogs\WebClientDialog.cs" />
     <Compile Update="Dialogs\SummaryDialog.cs" />
     <Compile Update="Dialogs\ServiceDialog.cs" />