Move the disconnectedCallback() call

The fix introduced in [hotwired#454][] resolved the issue, but
introduced a matching `disconnectedCallback()` far-off in the
`FrameRenderer`.

This commit moves that call to occur _immediately_ after it's paired
`element.connectedCallback()`.

[hotwired#454]: hotwired#454

src/core/frames/frame_controller.ts

@@ -439,6 +439,7 @@ function activateElement(element: Element | null, currentURL?: string | null) {
 
     if (element instanceof FrameElement) {
       element.connectedCallback()
+      element.disconnectedCallback()
       return element
     }
   }

src/core/frames/frame_renderer.ts

@@ -29,7 +29,6 @@ export class FrameRenderer extends Renderer<FrameElement> {
     if (sourceRange) {
       sourceRange.selectNodeContents(frameElement)
       this.currentElement.appendChild(sourceRange.extractContents())
-      frameElement.disconnectedCallback()
     }
   }