GTK L&F:The focus in the table can not be distinguished.

Testsuite: Regression manual
Test name(s):closed/javax/swing/JTable/4222153/bug4222153.java
Product(s) tested: JDK 8u231b01 (32bit)
OS/architecture: OEL6.4-UEK-x86
option:-Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Djdk.gtk.version=3 -Djdk.gtk.verbose=true

Actual behavior:

1)We can't distinguish the focus move to next cell,please refer to bug4222153.png
2)There is no such issue without option,please refer to bug4222153-no-option.png.

Affect tests:
closed/javax/swing/JTable/TAB/TAB.java please refer to tab.png
closed/javax/swing/JTable/KeyBoardNavigation/KeyBoardNavigation.java please refer to KeyBoardNavigation.png