[Folder View] In list view mode, fix home button disappearing every other subfolder entered
Test Plan:
Add a Folder View in a panel, open it in "list view" mode.
Navigate through several subfolders: the 'home' button that appears in the top left corner of the applet should not disappear every even number of subfolder you open.
Reviewed By: Plasma, hein
Subscribers: abetts, hein, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D15823