JBR-1144 [JDK11] [macos] Held down key is not deleted when press backspace after accent menu popup (Mojave)

Handled both Delete and ForwardDelete keys

Author: avu

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTView.m

@@ -295,30 +295,33 @@ - (void) keyDown: (NSEvent *)event {
     if (fEnablePressAndHold && [event willBeHandledByComplexInputMethod] &&
          fInputMethodLOCKABLE)
     {
+        BOOL skipProcessingCancelKeys = YES;
         fProcessingKeystroke = NO;
         if (!fInPressAndHold) {
             fInPressAndHold = YES;
             fPAHNeedsToSelect = YES;
-        } else if (IS_OSX_GT10_13) {
-            // Abandon input to reset IM and unblock input after canceling
-            // input accented symbols (macOS 10.14+ only)
-
+        } else {
             switch([event keyCode]) {
-                case kVK_Escape:
+                case kVK_ForwardDelete:
                 case kVK_Delete:
+                    skipProcessingCancelKeys = NO;
                 case kVK_Return:
-                case kVK_ForwardDelete:
+                case kVK_Escape:
                 case kVK_PageUp:
                 case kVK_PageDown:
                 case kVK_DownArrow:
                 case kVK_UpArrow:
                 case kVK_Home:
                 case kVK_End:
-                   [self abandonInput];
-                   break;
+                    if (IS_OSX_GT10_13) {
+                        // Abandon input to reset IM and unblock input after
+                        // canceling input accented symbols (macOS 10.14+ only)
+                        [self abandonInput];
+                    }
+                    break;
             }
         }
-        if ([event keyCode] != kVK_Delete) {
+        if (skipProcessingCancelKeys) {
             return;
         }
     }