Fix init error in formatter config misc tab

Enabling a string preference sets its text, which fires all event
listeners, which in this case wanted to update the preview, which wasn't
available yet because we were still initializing: NPE.

Instead, only disable the preference (this is apparently unproblematic)
when necessary, instead of enabling it when it was already enabled.

plugins/com.redhat.ceylon.eclipse.ui/src/com/redhat/ceylon/eclipse/code/style/FormatterTabMisc.java

@@ -65,10 +65,10 @@ public String isValid(String l) {
                         return null;
                     }
                 });
-
-        updatePreferences(
-                this.workingValues.get(FORMATTER_inlineAnnotations_List),
-                annotationsList, allAnnotations);
+        
+        if (allAnnotations.getChecked()) {
+            annotationsList.setEnabled(false);
+        }
 
         allAnnotations.addObserver(new Observer() {
             public void update(Observable o, Object arg) {