GNOME theme: one Steamify Vapor extension carries the shell colors; no gnome-shell-extensions bundle; dock shape left to the user

patches/steamify-vapor.js

@@ -0,0 +1,28 @@
+// Steamify Vapor (Steamify GNOME theme). Its stylesheet.css, which GNOME Shell loads
+// by itself, is the SteamOS look. This code: GNOME opens the overview after login;
+// Ubuntu starts on the desktop. So does this: the overview stays closed while the
+// shell starts up, and is available again right after.
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+import {Extension} from 'resource:///org/gnome/shell/extensions/extension.js';
+
+export default class SteamifyDesktopStart extends Extension {
+    enable() {
+        if (!Main.layoutManager._startingUp)
+            return;
+        this._hadOverview = Main.sessionMode.hasOverview;
+        Main.sessionMode.hasOverview = false;
+        this._startupId = Main.layoutManager.connect('startup-complete', () => {
+            Main.sessionMode.hasOverview = this._hadOverview;
+            Main.overview.hide();
+        });
+    }
+
+    disable() {
+        if (this._startupId) {
+            Main.layoutManager.disconnect(this._startupId);
+            this._startupId = null;
+        }
+        if (this._hadOverview !== undefined)
+            Main.sessionMode.hasOverview = this._hadOverview;
+    }
+}