Revert "Updated Admin Panel for Holiday Request"

This reverts commit 2aa8c421f707c0447e7e4ccb47d72e4d078873cf.

Conflicts:
	Holiday-App/Views/Shared/_Layout.cshtml
	Holiday-App/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
	HolidayApp.Core/Data/HolidayAppDb.cs