This changeset unifies borders used inside the `PassFailJFrame` framework and adds missing borders.
I started it in  for [JDK-8340306](https://bugs.openjdk.org/browse/JDK-8340306). That changeset handled only the instructions. This changeset add a border around the entire contents of the instruction frame, adds a border to the log area as well as to the failure reason dialog. The result looks more pleasing and consistent. I chose the gap of 4 because it plays nicely with fractional scales: 4 × 1.25 = 5 — no fractional pixels. ------------- Commit messages: - 8340799: Add border inside instruction frame in PassFailJFrame Changes: https://git.openjdk.org/jdk/pull/21327/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21327&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8340799 Stats: 47 lines in 1 file changed: 34 ins; 0 del; 13 mod Patch: https://git.openjdk.org/jdk/pull/21327.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/21327/head:pull/21327 PR: https://git.openjdk.org/jdk/pull/21327
