Linux GTK+ Dark makes low contrast in menu

Description

From certain point I see low contrast text in menus with my old settings Brave colors: Dark; Themes: GTK+ on Ubuntu 16

Steps to Reproduce

1. Take Ubuntu 16, install Brave Beta/Dev/Nightly
2. Setup the settings like

Actual result:

1. Click menu button in top-right corner, see The same is for the context menu

Expected result:

1. On Stable version this gives

Reproduces how often:

Easily

Brave version (brave://version info)

Brave	1.4.5 Chromium: 79.0.3945.56 (Official Build) nightly (64-bit)
Revision	73cc6bf591f792b99f8fc7cdfb8addedbd084bf8-refs/branch-heads/3945@{#788}
OS	Linux

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

With Dark+Classic all is good

• 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 @petemill

[rebron]

@simonhong Yes, can you create uplifts for 1.2 and 1.3. @Nicolab 1.2 in release is targeted for week of January 6th.

[Nicolab]

Ok thank you @simonhong