settingsPanel.add(fullScreenButton);
<BUG>settingsPanel.add(hangupButton);
settingsPanel.add(holdButton);</BUG>
if (infoButton != null)
<BUG>settingsPanel.add(infoButton);
settingsPanel.add(mergeButton);</BUG>
if (recordButton != null)
settingsPanel.add(recordButton);
<BUG>settingsPanel.add(showHideVideoButton);
settingsPanel.add(transferCallButton);</BUG>
settingsPanel.add(videoButton);

settingsPanel.add(fullScreenButton);
settingsPanel.add(hangupButton);
if (holdButton != null)
settingsPanel.add(holdButton);
if (infoButton != null)
settingsPanel.add(infoButton);
if (mergeButton != null)
settingsPanel.add(mergeButton);
if (recordButton != null)
settingsPanel.add(recordButton);
settingsPanel.add(showHideVideoButton);
if (mergeButton != null)
settingsPanel.add(transferCallButton);
settingsPanel.add(videoButton);
