Fixed select box rendering issue. (#6260)

Changed order of CSS files for combining

public/mix-manifest.json

@@ -5,7 +5,7 @@
     "/js/build/vue.js.map": "/js/build/vue.js.map?id=3aae6e8f609e5cd2842a",
     "/css/build/AdminLTE.css.map": "/css/build/AdminLTE.css.map?id=fa40c591a5b361cb0761",
     "/css/build/app.css.map": "/css/build/app.css.map?id=5a1bc8c3be0d3da37d0a",
-    "/css/all.css": "/css/all.css?id=d4da88a066c39e0ef7d0",
+    "/css/all.css": "/css/all.css?id=0a9b14700366dedbfab4",
     "/css/skins/skin-green-dark.min.css": "/css/skins/skin-green-dark.min.css?id=1039ae0e198a7f3d8da7",
     "/css/skins/skin-orange-dark.min.css": "/css/skins/skin-orange-dark.min.css?id=9a461970f7ab07f40847",
     "/css/skins/skin-red-dark.min.css": "/css/skins/skin-red-dark.min.css?id=99f90bbd653d7db10795",

webpack.mix.js

@@ -12,8 +12,8 @@ mix
   .less("./resources/assets/less/app.less", "css/build")
   .styles(
     [
-      "./public/css/build/AdminLTE.css",
       "./node_modules/select2/dist/css/select2.css",
+      "./public/css/build/AdminLTE.css",
       "./node_modules/admin-lte/plugins/iCheck/minimal/blue.css",
       "./node_modules/font-awesome/css/font-awesome.css",
       "./node_modules/icheck/skins/minimal/minimal.css",