IDEA-203999 Double CMD doesn't show tool windows

After-review optimisation

platform/platform-impl/src/com/intellij/openapi/wm/impl/ToolWindowManagerImpl.java

@@ -316,16 +316,8 @@ public class ToolWindowManagerImpl extends ToolWindowManagerEx implements Persis
         }
       }
     }
-    return getModifiersVKs(baseModifiers); // We should filter out 'mixed' mask like InputEvent.META_MASK | InputEvent.META_DOWN_MASK
-  }
-
-  @JdkConstants.InputEventMask
-  private static int getModifiersVKs(int mask) {
-    int vks = 0;
-    for (int modifier : new int[]{InputEvent.SHIFT_MASK, InputEvent.CTRL_MASK, InputEvent.META_MASK, InputEvent.ALT_MASK}) {
-      if ((mask & modifier) > 0) vks |= modifier;
-    }
-    return vks;
+    // We should filter out 'mixed' mask like InputEvent.META_MASK | InputEvent.META_DOWN_MASK
+    return baseModifiers & (InputEvent.SHIFT_MASK | InputEvent.CTRL_MASK | InputEvent.META_MASK | InputEvent.ALT_MASK);
   }
 
   private void resetHoldState() {