Undo/redo fully working

Normand Briere

2019-06-11 1d909ffa0c2beb51d453b53b845c4f3a749ca5f0

 GroupLeaf.java
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@@ -9,7 +9,8 @@
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  */
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 public class GroupLeaf extends Composite
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 {
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-    static final long serialVersionUID = -1647706059469889079L;
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+    static final long serialVersionUID =  // for wader: -6036608125951558970L;
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+                                -1647706059469889079L;
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     GroupLeaf()
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     {