Revert "Remove WebIDE devtools component."

This reverts commit 8c1500707f.

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

devtools/client/webide/themes/jar.mn

@@ -0,0 +1,24 @@
+# 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/.
+
+webide.jar:
+% skin webide classic/1.0 %skin/
+* skin/webide.css              (webide.css)
+  skin/icons.png               (icons.png)
+  skin/details.css             (details.css)
+  skin/newapp.css              (newapp.css)
+  skin/throbber.svg            (throbber.svg)
+  skin/deck.css                (deck.css)
+  skin/addons.css              (addons.css)
+  skin/runtimedetails.css      (runtimedetails.css)
+  skin/permissionstable.css    (permissionstable.css)
+  skin/monitor.css             (monitor.css)
+  skin/config-view.css         (config-view.css)
+  skin/wifi-auth.css           (wifi-auth.css)
+  skin/logs.css                (logs.css)
+  skin/panel-listing.css       (panel-listing.css)
+  skin/simulator.css           (simulator.css)
+  skin/rocket.svg              (rocket.svg)
+  skin/noise.png               (noise.png)
+  skin/default-app-icon.png    (default-app-icon.png)