Prefer place name over actual name in title bar

When inside a place, the address bar already gives it precedence over the actual folder name.
By doing this in the title bar also, we make it consistent and can mask ugly technical terminology
like "trash:/" and instead show the nice localized "Trash" place name as well as "Home" instead
of lowercase internal user name.

BUG: 211959

Differential Revision: https://phabricator.kde.org/D4826