Menu items icons not visible on dark mode

[srirambv]

Description

Menu items icons not visible on dark mode

Steps to Reproduce

1. Set browser to dark mode
2. Open widget menu
3. Menu icons looks dark

Actual result:

Expected result:

Should be visible

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	1.9.21 Chromium: 81.0.4044.92 (Official Build) nightly (64-bit)
Revision	32921c79b6f01a0fb2deef0e1d45b42f96581051-refs/branch-heads/4044@{#883}
OS	Windows 10 OS Version 1909 (Build 18363.778)

Version/Channel Information:

• Can you reproduce this issue with the current release? NA
• Can you reproduce this issue with the beta channel? NA
• Can you reproduce this issue with the dev channel? NA
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

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

Miscellaneous Information:

cc: @jamesmudgett

[srirambv]

Verification passed on

Brave	1.9.36 Chromium: 81.0.4044.113 (Official Build) nightly (64-bit)
Revision	cf9d66371ea608e227eed56ccba3abc2701bd23d-refs/branch-heads/4044@{#936}
OS	Windows 10 OS Version 1909 (Build 18363.778)

• Verified foreground widget menu items are visible
  
• Verified background widget menu items are visible
  

---

Verification passed on

Brave	1.9.36 Chromium: 81.0.4044.113 (Official Build) nightly (64-bit)
Revision	cf9d66371ea608e227eed56ccba3abc2701bd23d-refs/branch-heads/4044@{#936}
OS	Linux

• Verified foreground widget menu items are visible
  
• Verified background widget menu items are visible
  

---

Verification passed on

Brave	1.9.36 Chromium: 81.0.4044.113 (Official Build) nightly (64-bit)
Revision	cf9d66371ea608e227eed56ccba3abc2701bd23d-refs/branch-heads/4044@{#936}
OS	macOS Version 10.15.4 (Build 19E287)

• Verified foreground widget menu items are visible
  
• Verified background widget menu items are visible