Refactor entryproperties media db button.

Hard-coded input without inline JS, external onclick handler, hide
button on no-js.

References #54

templates/2k11/admin/serendipity_editor.js.tpl

@@ -863,6 +863,11 @@ var AccessifyHTML5 = function (defaults, more_fixes) {
         e.preventDefault();
     });
 
+    $('.customfieldMedia').click(function() {
+        var configitem = $(this).parent().find('textarea').attr('id');
+        serendipity.choose_media(configitem);
+    });
+
     $('#tree_toggle_all').click(function(e) {
         e.preventDefault();
         serendipity.treeToggleAll();

templates/2k11/admin/style.css

@@ -1932,6 +1932,7 @@ form > .button_link:first-of-type,
 .no-js .pluginmanager_grablet,
 .no-js .image_resize_hint,
 .no-js #serendipityScaleForm > .form_check,
+.no-js .customfieldMedia,
 .js .additional_info,
 .installer .toggle_info,
 .hidden,