Restore quickfixes functionality, except for UI

configs/client-default.js

@@ -309,6 +309,7 @@ module.exports = function(options) {
         },
         "plugins/c9.ide.language/keyhandler",
         "plugins/c9.ide.language/complete",
+        "plugins/c9.ide.language/quickfix",
         "plugins/c9.ide.language/marker",
         "plugins/c9.ide.language/refactor",
         "plugins/c9.ide.language/tooltip",

package.json

@@ -55,12 +55,12 @@
         "c9"
     ],
     "c9plugins": {
-        "c9.ide.language": "#4f50852f48",
+        "c9.ide.language": "#4b70f2fb99",
         "c9.ide.language.css": "#a649f2a710",
         "c9.ide.language.generic": "#77d43cfaf0",
         "c9.ide.language.html": "#0f4078c187",
         "c9.ide.language.html.diff": "#24f3608d26",
-        "c9.ide.language.javascript": "#62d2c61d1a",
+        "c9.ide.language.javascript": "#2b77bdb96a",
         "c9.ide.language.javascript.immediate": "#0535804ada",
         "c9.ide.language.javascript.eslint": "#08e0af061f",
         "c9.ide.language.javascript.tern": "#ad1d9b1b3a",