BUG : After channel group modification, group summary stops to work

[jogi997]

When I reorganize channel groups, it is usually not possible to show group summary for some groups. Easiest way to reproduce : move channels 31,30, 24 from last group to another one (I use drag'n'drop on main window). Once done, there is no way to show group summary (toggle on/off possible but nothing happens).Tested with version 0.9.7.1.
I noticed another drawback : if you enable group summary for group 3, last channel from group 4 is out of visible range (not possible to scroll down to it). The workaround I found : creating new project (acts like refresh or so...)