Slicer: underline element range in addition to bold font (better do it in IDEA code)

idea/src/org/jetbrains/kotlin/idea/slicer/KotlinSliceUsageCellRenderer.kt

@@ -20,6 +20,7 @@ import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.renderer.render
 import org.jetbrains.kotlin.resolve.descriptorUtil.isCompanionObject
 import org.jetbrains.kotlin.resolve.descriptorUtil.isExtension
+import java.awt.Font
 
 // Based on com.intellij.slicer.SliceUsageCellRenderer
 object KotlinSliceUsageCellRenderer : SliceUsageCellRendererBase() {
@@ -39,6 +40,10 @@ object KotlinSliceUsageCellRenderer : SliceUsageCellRendererBase() {
                 attributes = attributes.derive(attributes.style, JBColor.LIGHT_GRAY, attributes.bgColor, attributes.waveColor)
             }
 
+            if (attributes.fontStyle == Font.BOLD) {
+                attributes = attributes.derive(attributes.style or SimpleTextAttributes.STYLE_UNDERLINE, null, null, null)
+            }
+
             append(textChunk.text, attributes)
             if (i == 0) {
                 append(FontUtil.spaceAndThinSpace())