apply classes to combo elements

mix.exs

@@ -4,7 +4,7 @@ defmodule NITRO.Mixfile do
   def project do
     [
       app: :nitro,
-      version: "6.11.2",
+      version: "6.11.3",
       description: "NITRO Nitrogen Web Framework",
       package: package(),
       deps: deps()

src/elements/combo/element_comboLookup.erl

@@ -8,9 +8,9 @@ proto(#comboKeyup{delegate=Module}=Msg)  -> Module:proto(Msg);
 proto(#comboSelect{delegate=Module}=Msg) -> Module:proto(Msg).
 
 render_element(#comboLookup{id=Id, style=Style, value = Val, bind = Object,
-  feed = Feed, disabled = Disabled, delegate = Module} = Data) ->
+  feed = Feed, disabled = Disabled, delegate = Module, class = Class} = Data) ->
   nitro:render(
-    #link{id=form:atom([lookup, Id]), class=[dropdown], draggable=false,
+    #link{id=form:atom([lookup, Id]), class=lists:flatten([dropdown, Class]), draggable=false,
            body=[#input{id=Id, disabled = Disabled, type="comboLookup",
                         autocomplete = "off",
                         onkeyup = nitro:jse("comboLookupKeyup('"