Moved member boolean collapsible into the interface, where it belongs.(talisman)

git-svn-id: svn://10.0.0.236/trunk@17836 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/grendel/widgets/Collapsible.java

@@ -23,11 +23,13 @@
 
 package grendel.widgets;
 
-public abstract interface Collapsible {
+public interface Collapsible {
+  
+  final boolean collapsible = true;
 
-    public abstract void collapse();
+    public void collapse();
 
-    public abstract void expand();
+    public void expand();
 
     public boolean isCollapsible();