Handles multiple Keplr popup notifications simultaneously

[MANTRArob]

Motivation and context

This handles the situation where Keplr popup displays two notifications simultaneously.
Typically, we expect that after one notification is accepted or approved, the popup should disappear without showing any further notifications.

This is most likely due to Keplr not having the info of the chain.

Does it fix any issue?

#(issue)

Other useful info

To test this, you could point the test to https://elaisee.mantrachain.io/ which uses MANTRA chain which is not available in Keplr 0.12.68 that the current dev branch is using.

Quality checklist

• I have performed a self-review of my code.

⚠️👆 Delete any section you see irrelevant before submitting the pull request 👆⚠️

[rabi-siddique]

@MANTRArob This looks good to me. Could we add a test for this change? It would also be helpful to include instructions for manual testing. Thank you!

[MANTRArob]

@rabi-siddique Could you give brief instructions on where to add these two items? Thanks.

[rabi-siddique]

@rabi-siddique Could you give brief instructions on where to add these two items? Thanks.

@MANTRArob You can add instructions for manual testing in the PR description.
For automated testing, our end-to-end tests are located in the tests/e2e/specs/keplr/keplr-spec.js file. You can add tests there or create a new file in the same directory if needed.

[MANTRArob]

@rabi-siddique I added a new file to show that this method would still work with the existing flow defined in tests/e2e/specs/keplr/keplr-spec.js

[MANTRArob]

@rabi-siddique Removed unnecessary tests. I ran it locally against the sdk demo build

[rabi-siddique]

Thank You @MANTRArob!