Revert "Remove WebIDE devtools component."

This reverts commit 8c1500707f.

# Conflicts:
#	application/basilisk/components/customizableui/CustomizableUI.jsm

devtools/client/webide/content/logs.js

@@ -0,0 +1,70 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var Cu = Components.utils;
+const {require} = Cu.import("resource://devtools/shared/Loader.jsm", {});
+const {AppManager} = require("devtools/client/webide/modules/app-manager");
+
+window.addEventListener("load", function onLoad() {
+  window.removeEventListener("load", onLoad);
+
+  Logs.init();
+});
+
+window.addEventListener("unload", function onUnload() {
+  window.removeEventListener("unload", onUnload);
+
+  Logs.uninit();
+});
+
+const Logs = {
+  init: function () {
+    this.list = document.getElementById("logs");
+
+    Logs.onAppManagerUpdate = Logs.onAppManagerUpdate.bind(this);
+    AppManager.on("app-manager-update", Logs.onAppManagerUpdate);
+
+    document.getElementById("close").onclick = Logs.close.bind(this);
+  },
+
+  uninit: function () {
+    AppManager.off("app-manager-update", Logs.onAppManagerUpdate);
+  },
+
+  onAppManagerUpdate: function (event, what, details) {
+    switch (what) {
+      case "pre-package":
+        this.prePackageLog(details);
+        break;
+    }
+  },
+
+  close: function () {
+    window.parent.UI.openProject();
+  },
+
+  prePackageLog: function (msg, details) {
+    if (msg == "start") {
+      this.clear();
+    } else if (msg == "succeed") {
+      setTimeout(function () {
+        Logs.close();
+      }, 1000);
+    } else if (msg == "failed") {
+      this.log(details);
+    } else {
+      this.log(msg);
+    }
+  },
+
+  clear: function () {
+    this.list.innerHTML = "";
+  },
+
+  log: function (msg) {
+    let line = document.createElement("li");
+    line.textContent = msg;
+    this.list.appendChild(line);
+  }
+};