Tweak language preferences UI

Based on language-library-ui branch

package.json

@@ -55,7 +55,7 @@
         "c9"
     ],
     "c9plugins": {
-        "c9.ide.language": "#1526505f4c",
+        "c9.ide.language": "#2ed02629c7",
         "c9.ide.language.css": "#be07d72209",
         "c9.ide.language.generic": "#2b5cc6275e",
         "c9.ide.language.html": "#9be847c0ce",
@@ -90,7 +90,7 @@
         "c9.ide.imgeditor": "#612e75ef4f",
         "c9.ide.immediate": "#a962119bec",
         "c9.ide.installer": "#0fde9f0067",
-        "c9.ide.language.python": "#085ec22d4c",
+        "c9.ide.language.python": "#ae17118cbf",
         "c9.ide.mount": "#915b3d20be",
         "c9.ide.navigate": "#38ae100ea1",
         "c9.ide.newresource": "#981a408a7b",