I like to select articles / files / whatever by clicking on an item and
then selecting others by holding shift and moving the selection with the
arrow keys.

However this method of selection seems broken in pan (I tested on 0.14.0
and 0.14.91).

Reproductible: always

Steps to reproduce: In the header pane, click or middle button click on an
article to select it, hold shift, then use uparrow or downarrow to select
neighbour articles. While keeping the shift key pressed, let go the arrow
key, then re-press one of the arrow keys: instead of enlarging or reducing
the article selection by one, the selection shrinks to the last 2 articles
selected.

Expected behaviour: same as that I get by doing the same thing the the
groups pane or by loading files in xmms etc.
It should keep the whole selection, +-1 article when I press one of the
arrow keys again