The Backspace key doesn't lead to parent directory of current directory for JFileChooser in GTK LAF. Added the lazy input value in `GTKLookandFeel` and fix is working fine.
Implemented a manual test to check BackSpace behavior for all installed LAF in Linux platform. The test mentioned in [JDK-8078471](https://bugs.openjdk.org/browse/JDK-8078471) `javax/swing/JFileChooser/4150029/bug4150029.html` also working fine with GTK option (-client -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel). ------------- Commit messages: - Whitespace error fix - Backspace changes to parent directory Changes: https://git.openjdk.org/jdk/pull/11291/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11291&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8078471 Stats: 146 lines in 2 files changed: 146 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/11291.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11291/head:pull/11291 PR: https://git.openjdk.org/jdk/pull/11291
