LXPanel 0.8.2 in Lubuntu 16.04. The indicator applet in the panel works flawlessly in a horizontal panel, but in a vertical one it still displays the application icons next to each other horizontally instead of vertically. One can see this by changing the panel's width:
doubled width: two symbols
1 1/2 width: one symbol plus the half of another
normal width: just one of the symbols
What can I do to get the indicator area to display the symbols vertically?