zeal keeps trying to copy user-contributed docsets

[dodumosu]

hello, thanks for all the hard work on zeal!

this is a bit of a strange one. after (manually) adding a user contrib docset to zeal, i often rename the docset folder (as well as update the entries in the JSON manifest) since the name is usually mangled (for example "Bulma" is "B", "Leaflet" is "Lea", "Hapi" doesn't get a name, that sort of thing) after the docset gets installed.

however, every time after that i open the docsets dialog, zeal tries to make a new copy of each docset i changed, and i get two copies of each when it's done: the updated docset, and a copy of the mangled one.

using latest release (installed via scoop) on Windows 10, if that helps

[trollixx]

This was previously reported in #1240 and fixed in 84bf54c. Please give CI builds a try until v0.7.0 is released.