Misc: Do not set icon via GUI Designer

Since Designer references icon by filename it fails
due to recent update in IDEA icon files

 #KT-24580 Fixed

idea/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCompilerConfigurableTab.form

@@ -214,7 +214,6 @@
             </constraints>
             <properties>
               <focusable value="false"/>
-              <icon value="general/warningDialog.png"/>
               <inheritsPopupMenu value="false"/>
               <text value=""/>
               <visible value="false"/>

idea/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCompilerConfigurableTab.java

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.idea.compiler.configuration;
 
+import com.intellij.icons.AllIcons;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.components.ServiceManager;
 import com.intellij.openapi.fileChooser.FileChooserDescriptor;
@@ -126,6 +127,8 @@ public class KotlinCompilerConfigurableTab implements SearchableConfigurable, Co
         this.k2jvmCompilerArguments = k2jvmCompilerArguments;
         this.isProjectSettings = isProjectSettings;
 
+        warningLabel.setIcon(AllIcons.General.WarningDialog);
+
         if (isProjectSettings) {
             languageVersionComboBox.addActionListener(
                     new ActionListener() {