QFileDialog: bookmarks of dot directories bug

Doing the following reproduces a strange bug with QFileDialog on X11.

To reproduce

mkdir -p ~/.dotdirectory/foo
start examples/mainwindows/application example
ctrl + o
go to home directory
type in :.dotdirectory in lineedit and click enter
drag foo over to the sidebar
close dialog
open dialog
click on Computer
click on foo
notice that it will actually go into the foo directory
click on the home directory bookmark
click on foo
notice that it will go into the root directory