When using the Find dialog, if you hit ESC to close the dialog, then any
highlighted text in the editor gets deleted. The same thing happens if I
highlight some text, switch to a different tab, and then when I return to the
tab with the highlighted text, it deletes the selection. However, if I highlight
some text, leave Eric4 so that a separate program has input focus, and then
return to Eric4, the highlighted text is *not* deleted. As far as I've seen,
this unwanted deleting behavior only happens between the find dialog and the
various file tabs open in the editor.