Add improved StylableToast

[jaimehta19]

Are you a part of GSSOC' 21 ❔

• [ ] Yes ✅
• [ ] No ❎

Is your feature request related to a problem? Please describe.

Currently, the implemented StylableToast is not fully opaque. For the Forgot Password scanario, the Toast shows the underlying Text which seems a bit frustrating as it is overlapping in the first glance.

Describe the solution you'd like to add.

If there waas an opaque Stylable Toast implemented just like the default one, it would be better.

Additional context

Screenshot of Current translucent Stylable Toast:

Maybe fixed by: #103.

[Pranjali-49]

Hey @onso19 , I would like to work on this issue under GSSOC'22!