more code style settings editor fixes: do not dispose panels on reset (do reset instead)

platform/lang-impl/src/com/intellij/application/options/CodeStyleSchemesConfigurable.java

@@ -334,7 +334,9 @@ public class CodeStyleSchemesConfigurable extends SearchableConfigurable.Parent.
     }
 
     public void resetPanel() {
-      ensurePanel().reset();
+      if (myPanel != null) {
+        myPanel.reset();
+      }
     }
 
     public void reset() {

platform/lang-impl/src/com/intellij/application/options/codeStyle/CodeStyleMainPanel.java

@@ -132,7 +132,10 @@ public class CodeStyleMainPanel extends JPanel {
   }
 
   public void reset() {
-    clearPanels();
+    for (NewCodeStyleSettingsPanel panel : mySettingsPanels.values()) {
+      panel.reset();
+    }
+
     onCurrentSchemeChanged();
   }