add buttons to copy short and full nickname to clipboard

gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy

@@ -14,6 +14,8 @@ import net.i2p.data.Signature
 import net.i2p.data.SigningPrivateKey
 
 import java.awt.Desktop
+import java.awt.Toolkit
+import java.awt.datatransfer.StringSelection
 import java.awt.event.ActionEvent
 import java.nio.charset.StandardCharsets
 
@@ -485,6 +487,22 @@ class MainFrameController {
         startChat(p)   
     }
     
+    @ControllerAction
+    void copyShort() {
+        copy(model.core.me.getHumanReadableName())
+    }
+    
+    @ControllerAction
+    void copyFull() {
+        copy(model.core.me.toBase64())
+    }
+    
+    private void copy(String s) {
+        StringSelection selection = new StringSelection(s)
+        def clipboard = Toolkit.getDefaultToolkit().getSystemClipboard()
+        clipboard.setContents(selection, null)
+    }
+    
     void startChat(Persona p) {
         if (!mvcGroup.getChildrenGroups().containsKey(p.getHumanReadableName())) {
             def params = [:]

gui/griffon-app/views/com/muwire/gui/MainFrameView.groovy

@@ -499,7 +499,11 @@ class MainFrameView {
                 }
                 panel (border: etchedBorder(), constraints : BorderLayout.SOUTH) {
                     borderLayout()
-                    label(text : bind {model.me}, constraints: BorderLayout.CENTER)
+                    panel (constraints : BorderLayout.WEST) {
+                        label(text : bind {model.me})
+                        button(text : "Copy Short", copyShortAction)
+                        button(text : "Copy Full", copyFullAction)
+                    }
                     panel (constraints : BorderLayout.EAST) {
                         label("Connections:")
                         label(text : bind {model.connections})