[Electron] Add basic welcome screen (#1491)

* WIP

* Add LogTerminal

* Modify server startup view

* Add installView

* Add basic welcome screen and dev server setup

* nit

* nit

* nit

* nit

* nit

src/scripts/app.ts

@@ -1784,6 +1784,8 @@ export class ComfyApp {
    */
   async setup(canvasEl: HTMLCanvasElement) {
     this.canvasEl = canvasEl
+    // Show menu container for GraphView.
+    this.ui.menuContainer.style.display = 'block'
     await this.#setUser()
 
     this.resizeCanvas()

src/scripts/ui.ts

@@ -636,6 +636,8 @@ export class ComfyUI {
         }
       })
     ]) as HTMLDivElement
+    // Hide by default on construction so it does not interfere with other views.
+    this.menuContainer.style.display = 'none'
 
     this.restoreMenuPosition = dragElement(this.menuContainer, this.settings)