fix once and forever accidental deleting by backspace while editing speed search pattern

platform/platform-impl/src/com/intellij/openapi/keymap/impl/IdeKeyEventDispatcher.java

@@ -55,6 +55,7 @@ import com.intellij.ui.ComponentWithMnemonics;
 import com.intellij.ui.SimpleTextAttributes;
 import com.intellij.ui.components.JBOptionButton;
 import com.intellij.ui.popup.list.ListPopupImpl;
+import com.intellij.ui.speedSearch.SpeedSearchSupply;
 import com.intellij.util.Alarm;
 import com.intellij.util.Processor;
 import com.intellij.util.containers.ContainerUtil;
@@ -140,6 +141,10 @@ public final class IdeKeyEventDispatcher implements Disposable {
       return false;
     }
 
+    if (isSpeedSearchEditing(e)) {
+      return false;
+    }
+
     // http://www.jetbrains.net/jira/browse/IDEADEV-12372
     if (e.getKeyCode() == KeyEvent.VK_CONTROL) {
       if (e.getID() == KeyEvent.KEY_PRESSED) {
@@ -226,6 +231,18 @@ public final class IdeKeyEventDispatcher implements Disposable {
     }
   }
 
+  private static boolean isSpeedSearchEditing(KeyEvent e) {
+    int keyCode = e.getKeyCode();
+    if (keyCode == KeyEvent.VK_BACK_SPACE) {
+      Component owner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
+      if (owner instanceof JComponent) {
+        SpeedSearchSupply supply = SpeedSearchSupply.getSupply((JComponent)owner);
+        return supply != null && supply.isPopupActive();
+      }
+    }
+    return false;
+  }
+
   /**
    * @return <code>true</code> if and only if the <code>component</code> represents
    * modal context.