Show 'Find' context only for valid expressions

Make 'Find' context in Expressions view appears only when valid
expressions exist.

Author: SougandhS

debug/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/expression/ExpressionView.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2020 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -80,7 +80,9 @@ protected void configureToolBar(IToolBarManager tbm) {
 	protected void fillContextMenu(IMenuManager menu) {
 		menu.add(new Separator(IDebugUIConstants.EMPTY_EXPRESSION_GROUP));
 		menu.add(new Separator(IDebugUIConstants.EXPRESSION_GROUP));
-		menu.add(getAction(FIND_ACTION));
+		if (DebugPlugin.getDefault().getExpressionManager().getExpressions().length > 0) {
+			menu.add(getAction(FIND_ACTION));
+		}
 		ChangeVariableValueAction changeValueAction = (ChangeVariableValueAction)getAction("ChangeVariableValue"); //$NON-NLS-1$
 		if (changeValueAction.isApplicable()) {
 			menu.add(changeValueAction);