RFR: 8248: [Accessibility] Low Contrast in High Contrast mode on Stacktrace View [v4]

[Suchita Chaturvedi]

> This PR is to fix the accessibility issue for High Contrast mode. Stracktrace View was not readable at all in dark mode.
> 
> Before the fix:
> <img width="959" alt="image" src="https://github.com/user-attachments/assets/f12f1b7d-aa8a-4cce-8e0c-7731d5f9cc96">
> 
> After the fix:
> <img width="959" alt="image" src="https://github.com/user-attachments/assets/8f7be98a-206b-4758-a1c2-8971d7ab1c55">

Suchita Chaturvedi has updated the pull request incrementally with two additional commits since the last revision:

 - Merge branch '8248' of https://github.com/Suchitainf/jmc into 8248
 - Resolve Spotbug error

-------------

Changes:
  - all: https://git.openjdk.org/jmc/pull/580/files
  - new: https://git.openjdk.org/jmc/pull/580/files/fd2bcdf3..ef4ba472

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=580&range=03
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=580&range=02-03

  Stats: 8 lines in 1 file changed: 3 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jmc/pull/580.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/580/head:pull/580

PR: https://git.openjdk.org/jmc/pull/580