Grant notifications keeps showing up after page reload

[srirambv]

Description

Grant notifications keeps showing up after page reload

Steps to Reproduce

1. Clean profile
2. Enable Rewards, check Claim Grant message is shown above wallet summary
3. Check BR panel shows grant message, Click Ok to dismiss notification
4. Reload brave://rewards page, grant message shows up on BR panel again

Actual result:

https://youtu.be/fZJrSkpBwsI

Expected result:

Message should only be shown once. Dismissing it and reloading the page should not show the message again

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	0.56.7 Chromium: 70.0.3538.77 (Official Build) beta(64-bit)
Revision	0f6ce0b0cd63a12cb4eccea3637b1bc9a29148d9-refs/branch-heads/3538@{#1039}
OS	Linux

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?
  Yes

Website problems only:

• Does the issue resolve itself when disabling Brave Shields?
• Is the issue reproducible on the latest version of Chrome?

Additional Information

cc: @brave/legacy_qa

[NejcZdovc]

dupe of #1691

[srirambv]

@NejcZdovc not sure why this is closed as dupe. This one is specific to the grant showing up every time the page is reloaded and not having the notification stack up

[NejcZdovc]

I though that this was a dupe since we had this problem when you reload site you could stack them to infinite #1691 (comment). But I see that you click OK. So what happens is that when you click OK you clear notification and when you reload page you fetch it again, so we show notification again. So if we want to fix this to show only once per grant we need to discuss it.

[NejcZdovc]

closing as dupe of #2454