When a new filter is created quickfilters writes a "-" between each folder in
the hierarchy (assuming filers are named according to folder names).

It would be great to be able to choose a different delimiting character(s) ,
such as ">", "=>", "»" or "->" or suchlike.

Created an attachment (id=8506) [details]
3.7 prerelease 28

This version adds a new option to qF preference dialog on the "New Filter
Properties" tab. In the group "Naming Rules" beside Add parent folder name you
can add the delimiter of your choice. The new default symbol is » because it
looks better. Sadly, there is no way to run a "replacement" command on the
existing filters but I guess you could close Thunderbird and edit
msgFilterRules.dat manually (backup beforehand!).

Created an attachment (id=8508) [details]
3.7 prerelease 45

Fixes the issues with Unicode and also the fact that getStringPref is not yet
implemented in Thunderbird 52. I converted the listbox to a richlistbox, as
apparently listbox has been deprecated long ago. 

So there were a lot more changes in this version than initially planned. but I
am pleased with the result (at the moment)

IMplemented in Version 3.7 Released Oct. 5, 2018