Improve login flow a smidge by showing an error message and re-enabling the sign in button on failure

lib/dialogs/account.rb

@@ -68,10 +68,14 @@ module W3DHubLauncher
                     # FIXME: Retry? Show error? ???
                     pp settings_result
                   end
+                else
+                  dialog(
+                    Dialog::Alert,
+                    title: "Failed to sign in",
+                    message: "If you have failed 3 or more times in a row, wait about 15 minutes and try again."
+                  )
+                  btn.enabled = true
                 end
-
-                # FIXME: Show error message!
-                pp result
               end
             end
           end

lib/dialogs/alert.rb

@@ -0,0 +1,29 @@
+module W3DHubLauncher
+  class Dialog
+    class Alert < W3DHubLauncher::Dialog
+      def setup
+        super
+
+        stack(width: 1.0, max_width: 800, height: 1.0, max_height: 480, style_class: [:dialog]) do
+          flow(width: 1.0, background_nine_slice: NINE_SLICE_ROUNDED_TOP, background_nine_slice_from_edge: NINE_SLICE_EDGE, background_nine_slice_color: 0) do
+            banner @options[:title] || "", width: 1.0, text_align: :center
+          end
+
+          stack(style_class: [:dialog_container]) do
+            tagline @options[:message] || ""
+          end
+
+          flow(width: 1.0, padding: PADDING, background_nine_slice: NINE_SLICE_ROUNDED_BOTTOM, background_nine_slice_from_edge: NINE_SLICE_EDGE, background_nine_slice_color: 0) do
+            flow(fill: true)
+
+            button "Close", **CTA_BUTTON_THEME do
+              pop_state
+            end
+
+            flow(fill: true)
+          end
+        end
+      end
+    end
+  end
+end