Harderr when PFF timeline deleted

[allenleetc]

1. open a proj
2. remove the first/only PFF timeline
3. close proj
4. open another proj, get a harderror (see trace below)

Instead of step 2. above, maybe more plausible is: 2a. add a second PFF timeline. 2b. remove first PFF timeline because you don't need it anymore. Continue with step 3 etc.

Trace:
Error using handle.handle/get
Invalid or deleted object.
Error in JLabelGUIData/setLayout (line 423)
ax_pos = get(handles.axes_timeline_prop1,'Position');
Error in JLabel>initAfterBasicParamsSet (line 7931)
handles.guidata.setLayout(figureJLabel);
Error in JLabel>openEverythingFileGivenFileNameAbs (line 7884)
initAfterBasicParamsSet(figureJLabel);
Error in JLabel>openEverythingFileViaChooser (line 7745)
openEverythingFileGivenFileNameAbs(figureJLabel,fileNameAbs,groundTruthingMode)