Call clearText() instead of workaround for Bug 260664 in FilteredText

Change-Id: I9415752f61b2184ba90809e87d9bb22227be8152
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
diff --git a/bundles/org.eclipse.e4.ui.dialogs/src/org/eclipse/e4/ui/dialogs/filteredtree/FilteredTree.java b/bundles/org.eclipse.e4.ui.dialogs/src/org/eclipse/e4/ui/dialogs/filteredtree/FilteredTree.java
index 002365b..6f1016b 100644
--- a/bundles/org.eclipse.e4.ui.dialogs/src/org/eclipse/e4/ui/dialogs/filteredtree/FilteredTree.java
+++ b/bundles/org.eclipse.e4.ui.dialogs/src/org/eclipse/e4/ui/dialogs/filteredtree/FilteredTree.java
@@ -501,10 +501,7 @@
 			@Override
 			public void mouseDown(MouseEvent e) {
 				if (filterText.getText().equals(initialText)) {
-					// XXX: We cannot call clearText() due to
-					// https://bugs.eclipse.org/bugs/show_bug.cgi?id=260664
-					setFilterText(""); //$NON-NLS-1$
-					textChanged();
+					clearText();
 				}
 			}
 		});