Comment 6 for bug 1780363

@Jeff, @Seth: could you check if the patch in #5 fixes or breaks scrollbar jumping in the Symbol Editor on macOS?

On Windows the scrollbar behaves better with the two lines in place, i.e. there is absolutely no jump when a symbol is modified, whereas with the lines removed - the scrollbar will jump to the modified symbol if it was previously invisible.

The remaining question is shall the mentioned lines be excluded on Linux or Windows specific.