webgui: BUGFIX mergeWithModel handle duplicated element names
webgui: BUGFIX mergeWithModel handle duplicated element names

CESNET/Netopeer-GUI,CESNET/Netopeer-GUI,CESNET/Netopeer-GUI,CESNET/Netopeer-GUI,CESNET/Netopeer-GUI,CESNET/Netopeer-GUI