Ad grant notification is not dismissed from NTP rewards widget after claiming it from brave://rewards

[LaurenWags]

Description

Seems to be very similar to #6755

I just claimed this month's Ad grant from brave://rewards page and when I open new tabs the Rewards widget tells me that I have a grant to claim.

Steps to Reproduce

1. Have an ad grant waiting to be claimed
2. Open a NTP so you get the notification on NTP widget (I think this part might be important, steps from other issue did not have this in them)
3. Go claim grant from brave://rewards (do not claim from widget)
4. Open another NTP or refresh already opened NTP
5. See that the panel notification for the ad grant has gone away, but look at widget

Actual result:

Widget still prompts to claim ad grant even though it was already claimed

Expected result:

Prompt to claim ad grant should not show on widget after it has already been claimed

Reproduces how often:

Brave version (brave://version info)

Brave	1.23.59 Chromium: 89.0.4389.114 (Official Build) dev (x86_64)
Revision	1ea76e193b4fadb723bfea2a19a66c93a1bc0ca6-refs/branch-heads/4389@{#1616}
OS	macOS Version 10.15.7 (Build 19H524)

Version/Channel Information:

• Can you reproduce this issue with the current release? yes
• Can you reproduce this issue with the beta channel? yes, 1.23.x
• Can you reproduce this issue with the nightly channel? yes

Other Additional Information:

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

Miscellaneous Information:

[LaurenWags]

This was not solved with the new widget, reproduces with 1.34.x

[LaurenWags]

+1 from @srirambv https://bravesoftware.slack.com/archives/CB0KCRCQN/p1644387470694289

[srirambv]

Still an issue with the new rewards UI changes. Once ad grant is claimed the NTP widget notification is not dismissed nor can be manually closed

[zenparsing]

I was able to reproduce this in 1.37 using the following steps:

• Start browser with rewards staging and a new profile.
• Enable rewards from the panel.
• Open NTP.
  • (A grant notification will be displayed.)
• Close NTP.
• Open brave://rewards
• Claim grant.
• Open NTP.
  • (The grant notification will still be displayed.)

[GeetaSarvadnya]

Verification PASSED on

Brave | 1.37.84 Chromium: 99.0.4844.51 (Official Build) beta (64-bit)
-- | --
Revision | d537ec02474b5afe23684e7963d538896c63ac77-refs/branch-heads/4844@{#875}
OS | Windows 10 Version 21H2 (Build 19044.1526)

• Verified the STR mentioned in the description
• Logged Dismiss or close button is missing in grants notification in NTP widget #21587

Example	Example	Example

• Confirmed that ad grants notification is removed from the NTP widget after claiming the ad grants from brave://rewards

NTP Before claiming ad grants	NTP After claiming ad grants