Issue is observed that after changing the Look & Feel from Metal to Nimbus and back to Metal, the Nimbus font continues to be used by a JFileChooser. This is because Synth `installDefaults `methods set the font, but its inverse methods `uninstallDefaults `do not remove them. Fix is made to reset the font if it is set by L&F.
------------- Commit messages: - 6753661: JFileChooser font not reset after Look & Feel change Changes: https://git.openjdk.org/jdk/pull/12180/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12180&range=00 Issue: https://bugs.openjdk.org/browse/JDK-6753661 Stats: 55 lines in 2 files changed: 55 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/12180.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12180/head:pull/12180 PR: https://git.openjdk.org/jdk/pull/12180
