1639: Remove SearchGutterIconNavigationHandler and simplify markers

Deleted the unused `SearchGutterIconNavigationHandler` class and replaced its implementation in `PluginLineMarkerProvider` with direct `NavigationGutterIconBuilder` usage. This simplifies the code and removes redundant complexity.

Author: VitaliyBoyko

src/main/java/com/magento/idea/magento2plugin/linemarker/SearchGutterIconNavigationHandler.java

@@ -5,19 +5,15 @@
 
 package com.magento.idea.magento2plugin.linemarker.php;
 
-import com.intellij.codeInsight.daemon.GutterIconNavigationHandler;
 import com.intellij.codeInsight.daemon.LineMarkerInfo;
 import com.intellij.codeInsight.daemon.LineMarkerProvider;
 import com.intellij.codeInsight.navigation.NavigationGutterIconBuilder;
 import com.intellij.icons.AllIcons;
-import com.intellij.psi.NavigatablePsiElement;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.search.GlobalSearchScope;
-import com.intellij.psi.util.PsiTreeUtil;
 import com.intellij.util.indexing.FileBasedIndex;
 import com.jetbrains.php.lang.psi.elements.Method;
 import com.jetbrains.php.lang.psi.elements.PhpClass;
-import com.magento.idea.magento2plugin.linemarker.SearchGutterIconNavigationHandler;
 import com.magento.idea.magento2plugin.linemarker.php.data.PluginMethodData;
 import com.magento.idea.magento2plugin.project.Settings;
 import com.magento.idea.magento2plugin.stubs.indexes.PluginIndex;
@@ -74,22 +70,12 @@ public void collectSlowLineMarkers(
                 }
 
                 if (!results.isEmpty()) {
-                    final GutterIconNavigationHandler<PsiElement> navigationHandler =
-                            new SearchGutterIconNavigationHandler<>(
-                                    (Collection<? extends NavigatablePsiElement>) results,
-                                    TOOLTIP_TEXT
-                            );
-
-                    collection.add(
-                            NavigationGutterIconBuilder
-                                    .create(AllIcons.Nodes.Plugin)
+                    // Add the property to a collection of line marker info
+                    NavigationGutterIconBuilder<PsiElement> builder =
+                            NavigationGutterIconBuilder.create(AllIcons.Nodes.Plugin)
                                     .setTargets(results)
-                                    .setTooltipText(TOOLTIP_TEXT)
-                                    .createLineMarkerInfo(
-                                            PsiTreeUtil.getDeepestFirst(psiElement),
-                                            navigationHandler
-                                    )
-                    );
+                                    .setTooltipText(TOOLTIP_TEXT);
+                    collection.add(builder.createLineMarkerInfo(psiElement));
                 }
             }
         }