SLVUU-69: Display toast on layout load/save

[pling-scottlogic]

Description

Display toast notifications for all relevant scenarios pertaining to layout management.

Change List

• Wrap the ShellWithNewThemeAndLayoutManagement Showcase example with NotificationsProvider
• Call notify from useNotifications in the following instances:
  • Loading metadata returns an error
  • Loading the application layout returns an error
  • A layout is saved successfully
  • Saving a layout returns an error
  • An attempt is made to save an undefined layout

Testing

Manually tested on the ShellWithNewThemeAndLayoutManagement Showcase example by configuring the app to use remote layout management:

• Loading the example without first running the layout server results in an error toast being displayed
• Saving a layout (with the layout server running) results in a success toast being displayed

Evidence

Success toast displayed after saving a layout:

Error toast displayed after shutting down the layout server and refreshing the app:

[vferraro-scottlogic]

can we do this for sample app as well? (vuu-ui/sample-apps/app-vuu-example/index.tsx)

[pling-scottlogic]

0582ea4

[cfisher-scottlogic]

Just a couple of comments

[cfisher-scottlogic]

Should we add a case for when a user's layout fails to load? It's obvious that it's loaded successfully because you can see it. Is it obvious that it hasn't loaded successfully if you don't see it? Probably...

[vferraro-scottlogic]

LGTM

[pling-scottlogic]

Should we add a case for when a user's layout fails to load? It's obvious that it's loaded successfully because you can see it. Is it obvious that it hasn't loaded successfully if you don't see it? Probably...

Done: 7210e13

[pling-scottlogic]

Merged into Finos main under finos#1004