Added user-select input

app/Http/Controllers/UserSearchController.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace BookStack\Http\Controllers;
+
+use BookStack\Auth\User;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Http\Request;
+
+class UserSearchController extends Controller
+{
+    /**
+     * Search users in the system, with the response formatted
+     * for use in a select-style list.
+     */
+    public function forSelect(Request $request)
+    {
+        $search = $request->get('search', '');
+        $query = User::query()->orderBy('name', 'desc')
+            ->take(20);
+
+        if (!empty($search)) {
+            $query->where(function(Builder $query) use ($search) {
+                $query->where('email', 'like', '%' . $search . '%')
+                    ->orWhere('name', 'like', '%' . $search . '%');
+            });
+        }
+
+        $users = $query->get();
+        return view('form.user-select-list', compact('users'));
+    }
+}