Line Markers: Respect subclass module when filtering out duplicates

#KT-21010 Fixed

idea/src/org/jetbrains/kotlin/idea/highlighter/markers/KotlinLineMarkerProvider.kt

@@ -12,6 +12,7 @@ import com.intellij.codeInsight.daemon.impl.MarkerType
 import com.intellij.codeInsight.daemon.impl.PsiElementListNavigator
 import com.intellij.codeInsight.navigation.ListBackgroundUpdaterTask
 import com.intellij.icons.AllIcons
+import com.intellij.ide.util.PsiClassOrFunctionalExpressionListCellRenderer
 import com.intellij.openapi.actionSystem.IdeActions
 import com.intellij.openapi.editor.colors.CodeInsightColors
 import com.intellij.openapi.editor.colors.EditorColorsManager
@@ -42,6 +43,7 @@ import org.jetbrains.kotlin.idea.facet.implementedDescriptor
 import org.jetbrains.kotlin.idea.facet.implementingDescriptors
 import org.jetbrains.kotlin.idea.search.declarationsSearch.toPossiblyFakeLightMethods
 import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
+import org.jetbrains.kotlin.idea.util.module
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getPrevSiblingIgnoringWhitespaceAndComments
@@ -155,12 +157,20 @@ interface TestableLineMarkerNavigator {
     fun getTargetsPopupDescriptor(element: PsiElement?): NavigationPopupDescriptor?
 }
 
+private class SubclassRenderer: PsiClassOrFunctionalExpressionListCellRenderer() {
+    override fun getComparingObject(element: NavigatablePsiElement?): Comparable<Nothing> {
+        val baseText = super.getComparingObject(element)
+        val moduleName = element?.module?.name ?: return baseText
+        return "$baseText [$moduleName]"
+    }
+}
+
 private val SUBCLASSED_CLASS = MarkerType(
         "SUBCLASSED_CLASS",
         { getPsiClass(it)?.let { MarkerType.getSubclassedClassTooltip(it) } },
         object : LineMarkerNavigator() {
             override fun browse(e: MouseEvent?, element: PsiElement?) {
-                getPsiClass(element)?.let { MarkerType.navigateToSubclassedClass(e, it) }
+                getPsiClass(element)?.let { MarkerType.navigateToSubclassedClass(e, it, SubclassRenderer()) }
             }
         })