Use zenity to select users and copy their tox ID to the clipboard

src/freedombone-image-customise

     # for gtk dialog entry
     chroot "$rootdir" apt-get -yq install zenity
 
+    StrMeshUsers=$"Mesh Users"
+    StrUsername=$'Username'
+    StrToxID=$'Tox ID'
+
     # Produce a text file on the desktop listing users on the mesh
     cat <<EOF > $rootdir/usr/bin/list-tox-users
 #!/bin/bash
     echo "\$users_list" > /tmp/Users.txt
     chown $MY_USERNAME:$MY_USERNAME /tmp/Users.txt
 
-    echo 'showing_users=\$(ps aux | grep $MESH_TEXT_EDITOR | grep "Users.txt")' > /home/$MY_USERNAME/showusers
-    echo 'if [ \${#showing_users} -eq 0 ]; then' >> /home/$MY_USERNAME/showusers
-    echo '    $MESH_TEXT_EDITOR /tmp/Users.txt' >> /home/$MY_USERNAME/showusers
-    echo 'fi' >> /home/$MY_USERNAME/showusers
-    echo 'exit 0' >> /home/$MY_USERNAME/showusers
-    chmod +x /home/$MY_USERNAME/showusers
-    chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/showusers
+    if [ ! -f /home/$MY_USERNAME/showusers ]; then
+        echo '#!/bin/bash' > /home/$MY_USERNAME/showusers
+        echo 'data=$(' >> /home/$MY_USERNAME/showusers
+        echo 'cat /tmp/Users.txt | \' >> /home/$MY_USERNAME/showusers
+        echo "    awk -F ' ' '{" >> /home/$MY_USERNAME/showusers
+        echo '        for(i=1;i<=NF;i++){' >> /home/$MY_USERNAME/showusers
+        echo '            print $i;' >> /home/$MY_USERNAME/showusers
+        echo '        }' >> /home/$MY_USERNAME/showusers
+        echo "}' | \\" >> /home/$MY_USERNAME/showusers
+        echo '    zenity --list \' >> /home/$MY_USERNAME/showusers
+        echo "     --title='$StrMeshUsers' \\" >> /home/$MY_USERNAME/showusers
+        echo "     --column='$StrUsername' --column='$StrToxID' \\" >> /home/$MY_USERNAME/showusers
+        echo '     --print-column=2 --hide-column=2 --width=250 --height=400)' >> /home/$MY_USERNAME/showusers
+        echo 'if [ ! $data ]; then' >> /home/$MY_USERNAME/showusers
+        echo '    exit 0' >> /home/$MY_USERNAME/showusers
+        echo 'fi' >> /home/$MY_USERNAME/showusers
+        echo 'echo "$data" | xclip -selection clipboard' >> /home/$MY_USERNAME/showusers
+        chmod +x /home/$MY_USERNAME/showusers
+    fi
 
     echo '[Desktop Entry]' > /home/$MY_USERNAME/Desktop/Users.desktop
     if [ \$no_of_users -lt 2 ]; then