synchronize the views with the template selector

The plug-in template selector has two components -
template list, and the help text (FormBrowser).
While the first widget follows the toggle button
properly, the formbrowser does not.

Fix that, by toggling between enabled and disabled
states following the template selector button.

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/parts/FormBrowser.java

@@ -24,6 +24,7 @@ public class FormBrowser {
 	FormToolkit toolkit;
 	Composite container;
 	ScrolledFormText formText;
+	FormText ftext;
 	String text;
 	int style;
 
@@ -44,7 +45,7 @@ public void createControl(Composite parent) {
 			formText.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TREE_BORDER);
 			toolkit.paintBordersFor(container);
 		}
-		FormText ftext = toolkit.createFormText(formText, false);
+		ftext = toolkit.createFormText(formText, false);
 		formText.setFormText(ftext);
 		formText.setExpandHorizontal(true);
 		formText.setExpandVertical(true);
@@ -72,4 +73,11 @@ public void setText(String text) {
 		if (formText != null)
 			formText.setText(text);
 	}
+
+	public void setEnabled(boolean enabled) {
+		if (formText != null)
+			formText.setEnabled(enabled);
+		if (ftext != null)
+			ftext.setEnabled(enabled);
+	}
 }

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/wizards/BaseWizardSelectionPage.java

@@ -58,5 +58,6 @@ public void setDescriptionEnabled(boolean enabled) {
 		Control dcontrol = descriptionBrowser.getControl();
 		if (dcontrol != null)
 			dcontrol.setEnabled(enabled);
+		descriptionBrowser.setEnabled(enabled);
 	}
 }

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/wizards/plugin/TemplateListSelectionPage.java

@@ -121,6 +121,7 @@ protected void initializeViewer() {
 		wizardSelectionViewer.addFilter(new WizardFilter());
 		if (getInitialTemplateId() != null)
 			selectInitialTemplate();
+		setDescriptionEnabled(false);
 	}
 
 	private void selectInitialTemplate() {