Make the error boundary work

We had an error boundary at the top level of the app, but it didn't
work because it used ErrorPage which tried to use a bunch of things
like useLocation() and an error prop. Also it wasn't passed in correctly
anyway.

This wires it up correctly to a separate view with a button to send
debug logs, and also moves it down a few layers so it has access to
enough things to be able to send rageshakes.

Related: https://github.com/vector-im/element-call/issues/421

src/FullScreenView.module.css

@@ -36,6 +36,12 @@
   margin-bottom: 0;
 }
 
-.homeLink {
+/* Make the buttons the same width */
+.wideButton {
   width: 291px;
 }
+
+/* Fixed height to avoid content jumping around*/
+.sendLogsSection {
+  height: 50px;
+}